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Last updated: Sat, 27 Jan 2007

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# implode

(PHP 3, PHP 4, PHP 5)

implode -- Объединяет элементы массива в строку

## Описание

string implode ( string glue, array pieces )

Возвращает строку, полученную объединением строковых представлений элементов массива `pieces`, со вставкой строки `glue` между соседними элементами.

Пример 1. Пример использования implode()

`<?php $array = array('lastname', 'email', 'phone'); $comma_separated = implode(",", $array); echo $comma_separated; // lastname,email,phone ?>`

> Замечание: По историческим причинам, функции implode() можно передавать аргументы в любом порядке, однако для унификации с функцией explode() следует использовать документированный порядок аргументов.

> Замечание: Начиная с версии 4.3.0 аргумент `glue` функции implode() является необязательным и по умолчанию равен пустой строке (''). Для обеспечении обратной совместимости рекомендуется всегда передавать оба аргумента.

> Замечание: Эта функция безопасна для обработки данных в двоичной форме.

См. также описания функций explode() и split().

add a note User Contributed Notes
implode
drewish at katherinehouse dot com
10-Jan-2007 08:07
`Here's a pretty clean version of the english_list:
<?php
function english_list($array) {
switch (count($array)) {
case 0:
return '';
case 1:
return array_pop($array);
default:
$last = array_pop($array);
return implode(', ', $array) . ' and ' . $last;
}
}
?>`
ahigerd at stratitec dot com
04-Jan-2007 06:43
`Note that PHP uses copy-on-write so passing parameters (even array parameters) by reference gains you no performance benefit, and in fact in some cases can HURT performance.
For example:
php > $array = array('a','s','d','f');
php > $start = microtime(true); for($i=0; $i<1000000; $i++) byref($array); echo microtime(true)-$start;
2.40807890892
php > $start = microtime(true); for($i=0; $i<1000000; $i++) byval($array); echo microtime(true)-$start;
1.40822386742`
bishop
23-Nov-2006 06:33
`The english_list() implementation of davidpk212 at gmail dot com, Andy Morris, and tshort at cisco dot com does not handle the case of a two-element array with Oxford comma. Example:
<?php
english_list(array ('a', 'b'), true) // == 'a, and b'
// should be 'a and b'
?>
Here's another implementation that addresses this issue, uses pass-by-reference without modifying the array, and illustrates yet another approach to solving the problem:
<?php
function english_list(&$array, $useOxfordComma = false) {
$count = (is_array($array) ? count($array) : 0);
if (3 <= $count) {
$last = end($array);
$list = prev($array) . ($useOxfordComma ? ', and ' : ' and ') . $last;
while ($v = prev($array)) {
$list = $v . ', ' . $list;
}
} else if (2 == $count) {
$last = end($array);
$list = prev($array) . ' and ' . $last;
} else if (1 == $count) {
$list = end($array);
} else {
return '';
}
reset($array);
return $list;
}
?>
Run times for this version are comparable to the run times for heir earlier posted versions.`
richard at happymango dot me dot uk
23-Nov-2006 04:43
`This is a simple function that is the same as implode except it allows you to specify two glue parameters instead of one so an imploded array would output "this, this, this and this" rather than "this, this, this, this, this".
This is useful if you want to implode arrays into a string to echo as part of a sentence.
It uses the second glue between the last two items and the first glue between all others. It will use the second glue if there are only two items to implode so it would output "this and this".
<?php
function implode2($glue1, $glue2, $array)
{
return ((sizeof($array) > 2)? implode($glue1, array_slice($array, 0, -2)).$glue1 : "").implode($glue2, array_slice($array, -2));
}
//example below
$array = array("Monday", "Tuesday");
echo "1: ".implode2(', ', ' and ', $array)."<br />";
$array = array("Mon", "Tue", "Wed", "Thu", "Fri");
echo "2: ".implode2(', ', ' &amp; ', $array)."<br />";
$array = array( 1, 2, 3, 4, 10);
echo "3: ".implode2(' + ', ' = ', $array)."<br />";
?>
This outputs
1: Monday and Tuesday
2: Mon, Tue, Wed, Thu & Fri
3: 1 + 2 + 3 + 4 = 10`
Demonisch
05-Oct-2006 02:11
`Very simple function for imploding a certain column in a 2D array. Useful if you have fetched records from a database in an associative array and want to store all the values in a certain column as a string, for use with JavaScript or passing values from page to page.
$sep = the separator, such as " ", "," or "&amp;"
$array = the 2D associative array
$key = the column key, such as "id"
Feel free to add error protection
function implodeArray2D ($sep, $array, $key)
{
$num = count($array);
$str = "";
for ($i = 0; $i < $num; $i++)
{
if ($i)
{
$str .= $sep;
}
$str .= $array[$i][$key];
}
return $str;
}`
triptripon at gmail dot com
05-Sep-2006 02:18
`Here's my 2 matching (implode|explode)_with_key functions.
Notice, the inglue, outglue cannot appear within the keys\values.
function implode_with_key($assoc, $inglue = '>', $outglue = ',')
{
$return = '';
foreach ($assoc as $tk => $tv)
{
$return .= $outglue . $tk . $inglue . $tv;
}
return substr($return,strlen($outglue));
}
function explode_with_key($str, $inglue = ">", $outglue = ',')
{
$hash = array();
foreach (explode($outglue, $str) as $pair)
{
$k2v = explode($inglue, $pair);
$hash[$k2v[0]] = $k2v[1];
}
return $hash;
}
-- Tomer Levinboim`
worldwideweb dot C-Kling dot de
12-Aug-2006 12:15
`A Script for imploding a multideimensional Array. You give an array of separators in the first argument, and a (multidimensional) array in the second. The script will return the imploded array.
<?php
function multimplode($spacer,$array)
{
if (!is_array($array))
{
return($array);
}
if (empty($spacer))
{
return(multimplode(array(""),$array));
}
else
{
$trenn=array_shift($spacer);
while (list($key,$val) = each($array))
{
if (is_array($val))
{
$array[$key]=multimplode($spacer,$val);
}
}
$array=implode($trenn,$array);
return($array);
}
}
?>`
adnan at barakatdesigns dot net
23-May-2006 09:17
`An easier way of achieving the same result as implode_with_keys() - and quicker execution time:
<?
/* NOTE: $glue is not used if $is_query is true */
function implode_with_keys($array, $glue, $is_query = false) {
if($is_query == true) {
return str_replace(array('[', ']', '&'), array('%5B', '%5D', '&amp;'), http_build_query($array));
} else {
return urldecode(str_replace("&", $glue, http_build_query($array)));
}
}
echo implode_with_keys(array('a[1]' => 'some text', 'a[2]' => 'even more text'), false, true);
/* Will output 'a%5B1%5D=some+text&amp;a%5B2%5D=even+more+text' */
/* This won't break html validation */
echo implode_with_keys(array('a[1]' => 'foo bar', 'b' => 'more text'), '|');
/* Will output 'a[1]=foo bar|b=more text' */
?>`
dabduster at gmail dot com
03-Jan-2006 08:39
`an implementation of adrian at foeder dot de implode_with_keys function for input and update sql statement.
function implode_param($glue, $array, $valwrap='', $mode = 0)
{
/*
if mode = 0 output is key and values
if mode = 1 output only keys
if mode = 2 output only values
*/
switch ($mode){
case 1:
foreach($array AS $key => $value) {
$ret[] = $valwrap.$key.$valwrap;
}
break;
case 2:
foreach($array AS $key => $value) {
$ret[] = $valwrap.$value.$valwrap;
}
break;
default:
case 0:
foreach($array AS $key => $value) {
$ret[] = $key."=".$valwrap.$value.$valwrap;
}
break;
}
return implode($glue, $ret);
}`
Hotmail resident Tree2054
08-Dec-2005 11:57
`Combining into one function:
function implode_with_options($assoc_array, $prefix = '', $k_v_glue = '', $vwrap = '', $seperator = '')
{
foreach ($assoc_array as $k => $v)
{
$tmp[] = $k . $k_v_glue . $vwrap . $v . $vwrap;
}
return $prefix . implode($seperator, $tmp);
}
$items = array('Apples', 'number' => 3, 'Vehicle' => '');
// For a query string:
echo implode_with_options($items, '?', '=', '', '&');
/**
* Produces
* ?0=Apples&number=3&Vehicle=
*/
// For a SQL query
echo implode_with_options($items, '', '=', '"', ', ');
/**
* Produces
* 0="Apples", number="3", Vehicle=""
*/`
adrian at foeder dot de
31-Oct-2005 04:53
`...and a mysql-update-statement-compatible implementation of implode_with_keys:
<?php
function implode_with_keys($glue, $array, $valwrap='')
{
foreach($array AS $key => $value) {
$ret[] = $key."=".$valwrap.$value.$valwrap;
}
return implode($glue, $ret);
}
?>
so implode_with_keys(", ", $array, "'") will output:
key1='value1', key2='value2'
and so on. Useful for UPDATE table SET key1='value1', key2='value2'`
Peter Hopfgartner
27-Sep-2005 07:26
`Correctly initializing all variables, this would become:
function implode_with_key($assoc, $inglue = '=', $outglue = '&'){
$return = '';
foreach ($assoc as $tk => $tv) {
$return = ($return != '' ? $return . $outglue : '') .
$tk . $inglue . $tv;
}
return $return;
}
Note, the return value is also well defined if $assoc is empty.
Regards`
php at josh dot jeppsons dot org
09-Sep-2005 09:22
`Another variation on implode_with_key:
<?php
function implode_with_key($assoc, $inglue = '=', $outglue = '&')
foreach ($assoc as $tk => $tv) {
$return = (isset($return) ? $return . $outglue : '') . $tk . $inglue . $tv;
}
return $return;
}
?>`
pr10n at spymac dot com
29-Aug-2005 09:46
`A little tweak on info at urbits dot com's suggestion just incase someone changes their value of $outglue:
<?php
function implode_with_key($assoc, $inglue = '=', $outglue = '&')
{
$return = null;
foreach ($assoc as $tk => $tv) $return .= $outglue.$tk.$inglue.$tv;
return substr($return,strlen($outglue));
}
?>`
info at urbits dot com
19-Aug-2005 06:06
`I liked memandeemail's (27-Apr-2005) neat code for imploding an associative array. I have done a mod so that, by default, it returns a url query string.
<?php
function implode_with_key($assoc, $inglue = '=', $outglue = '&')
{
$return = null;
foreach ($assoc as $tk => $tv) $return .= $outglue.$tk.$inglue.$tv;
return substr($return,1);
}
?>
Example:
<?php
$assoc_array = array("a" => "foo", "b" => "bar", "c" => "foobar");
echo (implode_with_key($assoc_array);
?>
ouput: a=foo&b=bar&c=foobar
usage: After altering the $HTTP_GET_VARS values, I pass $HTTP_GET_VARS to the function to easily build variation urls for links and header redirects.
note: This function doesn't encode the url string or check for empty variables.`
cristianDOTzuddas [AT] gmailDOTcom
07-Jul-2005 12:22
`...and another variation of "implode_assoc" function. Just added the boolean parameter $urlencoded; if TRUE returns the array value in URL encod format. If the parameter is not given it behaves like the original function.
<?
function implode_assoc($inner_glue, $outer_glue, $array, $skip_empty=false, $urlencoded=false) {
$output = array();
foreach($array as $key=>$item) {
if (!$skip_empty || isset($item)) {
if ($urlencoded)
$output[] = $key.$inner_glue.urlencode($item);
else
$output[] = $key.$inner_glue.$item;
}
}
return implode($outer_glue, $output);
}
?>`
sam dot bledsoe at nosp at nn dot gmail dot com
31-May-2005 08:57
`The function below recursively outputs an array in a format condusive to parsing it in php or another scripting language. It does NOT output the name of the original array, for that see note 1. It handles all the cases I could think of elegantly. Comments and criticisms are welcome.
For an array constructed with:
$arr = array("foo" => array('bar' => array(0 => "value 0", 1 => "value 1")), "foo two" => array(0 => array("bar" => "value2")));
The line below:
echo implode_parseable("=", ";<br>$", $arr, "$", ";");
Will produce:
$foo["bar"][0]="value 0";
$foo["bar"][1]="value 1";
$foo_two[0]["bar"]="value2";
NOTES:
1) If the leading identifier on a line is a number, the output will most likely be unusable since variable names cannot begin with numbers. You can get around this by doing something like:
$arr = array('arr' => $arr);
This will output the array as it actually is (because the key is the same name as the array) instead of just its fields.
2) Since spaces are not allowed in variable names, they are replaced in lines' leading identifiers by the $space_replace_char parameter, '_' by default.
Hopefully someone will find this useful, if so drop me a line. Credit and thanks go out to the people who posted their code on this manual page, especially davidpk212 at gmail dot com and phpWalter at torres dot ws.
function implode_parseable($inner_glue = "=", $outer_glue = "\n", $array = null, $prefix = "", $suffix = "", $space_replace_char = '_', $skip_empty = false, $current_loc = "", $recursion_level = 0){
return $prefix . implode_parseable_r($inner_glue, $outer_glue, $array, $space_replace_char, $skip_empty, $current_loc, $recursion_level) . $suffix;
}
function implode_parseable_r($inner_glue = "=", $outer_glue = "\n", $array = null, $space_replace_char = '_', $skip_empty = false, $current_loc = "", $recursion_level = 0)
{
if(is_array($array)){
$output = array();
foreach( $array as $key => $item ){
if ( is_array ($item) ){
//don't quote numeric indicies
if(is_string($key))
$quoted_key = "\"" . $key . "\"";
else
$quoted_key = $key;
// This is value is an array, go and do it again!
$level = $recursion_level + 1;
if($recursion_level == 0){
// can't have spaces in a variable name!
$current_loc .= str_replace(' ', $space_replace_char, $key);
$output[] = implode_parseable_r ($inner_glue, $outer_glue, $item, '_', $skip_empty, $current_loc, $level);
//start the position tracker over after every run from level 0
$current_loc = '';
}else{
$current_loc .= "[" . $quoted_key . "]";
$output[] = implode_parseable_r ($inner_glue, $outer_glue, $item, '_', $skip_empty, $current_loc, $level);
//remove the last index from the position tracker string after using it
$current_loc = ereg_replace('\[[^]]*\]$', '', $current_loc);
}
}
else{
// don't quote or []ify the base variable name,
// but do for all else as appropriate
if($recursion_level != 0){
if(is_string($key))
$key = "\"" . $key . "\"";
$key = "[" . $key . "]";
}
// echo "<br>";
// var_dump($item);
// echo "<br>";
$skip_this = false;
if($skip_empty && (!isset($item) || $item == NULL || $item == '')) $skip_this = true;
//quote the item (which is the value of the array index) if it is a string
if(is_string($item)) $item = "\"" . $item . "\"";
if(!$skip_this) $output[] = $current_loc . $key . $inner_glue . $item;
}
}
return implode($outer_glue, $output);
}else{
return $array;
}
}`
Kl�ba
31-May-2005 05:42
`in case of value $item==0 but is set is necessary use function isset()
function implode_assoc($inner_glue,$outer_glue,$array,$skip_empty=false){
$output=array();
foreach($array as $key=>$item)
if(!$skip_empty || isset($item)){$output[]=$key.$inner_glue.$item;}
return implode($outer_glue,$output);
}`
killroy at g m a i l dot c o m
16-May-2005 01:29
`Here is another variation on Chris' function. I added a $skip_empty parameter. if it's set to TRUE the result string will not contain keys whose values are empty. Great for building query_strings. If the parameter is not given it behaves like the original function:
$a='1';
$b='';
$c='3';
INPUT: implode_assoc('=','&',array('a'=>$a,'b'=>$b,'c'=>$c),true);
OUTPUT: a=1&c=3
INPUT: implode_assoc('=','&',array('a'=>$a,'b'=>$b,'c'=>$c));
OUTPUT: a=1&b=&c=3
function implode_assoc($inner_glue,$outer_glue,$array,$skip_empty=false){
$output=array();
foreach($array as $key=>$item)
if(!$skip_empty || $item){$output[]=$key.$inner_glue.$item;}
return implode($outer_glue,$output);
}`
tshort at cisco dot com
29-Apr-2005 07:20
`Correction: I meant "passed by value", not "pass by reference". My mistake. Passing by reference would speed up any of these functions by avoiding the copy necessary for "by value.
Other solutions have problems with non-arrays as well. But it demonstrates that there are many ways to solve this problem. Adding checks for non-arrays and short arrays makes the solution less elegant, but safer. Other solutions should have included similar protections.
function english_list($array, $oxfordComma=0)
{
if (!is_array($array)) return $array;
if (count($array) <= 1) return join(", ", $array);
$last = array_pop($array);
return join(", ", $array) . ($oxfordComma ? "," : "") . " and " . $last;
}`
Andy Morris
28-Apr-2005 05:27
`It's always dangerous to give sweeping statements like "this will always work!". Your solution is much more elegant than mine, but perhaps it's a little too elegant for its own good! Try giving it an array with zero or one elements in it for example. You could say that folks shouldn't call it in that case, but you know folks... they like pushing the boundaries. :-)
Perhaps you meant to say that the array can be altered inside the function because it is passed "by value" rather than "by reference", or is that just a mixture of terminology from my C++ upbringing? Passing by reference would imply that you could alter the array inside the function and have that alter its value outside. Passing by value implies that any changes inside the function affect the local function copy only. In PHP, the latter is clearly the case, unless a variable is explicitly declared as global.
OK, that's my 2c.`
tshort at cisco dot com
28-Apr-2005 01:54
`/*
english_list()
This one works with anything, since the array is passed by reference, modifying it in the function via pop has no effect on the array outside the function. But it can't be done on one line, because the array_pop() must occur before the join().
*/
function english_list($array, $oxfordComma=0)
{
$last = array_pop($array);
return join(", ", $array) . ($oxfordComma ? "," : "") . " and " . $last;
}`
Andy Morris
28-Apr-2005 10:19
`Similar to a previous note, but this works for any length array, plus also works for arrays with key strings instead of integer keys! I know it's not strictly an implode() example, but it concerns what you might be considering using implode() to help you to do achieve...
<?php
// Return array as a comma separated list; final two elements separated
// by 'and' with an optional "Oxford" comma preceding the 'and'.
function english_list($array, $oxfordComma=0)
{
$optionalComma = ( $oxfordComma ) ? "," : "";
$str = "";
$size = count( $array );
$i = 0;
foreach ( $array as $item ) {
$str .= $item;
$i++;
if ( $i < $size - 1) $str .= ", ";
elseif ( $i == $size - 1) $str .= $optionalComma." and ";
}
return $str;
}
// test the comma separated list function
echo english_list( array(), 1 )."<br>";
echo english_list( array("foo"), 1 )."<br>";
echo english_list( array("foo", "bar"), 0 )."<br>";
echo english_list( array("a" => "foo", "b" => "bar", "c" => "foobar"), 1 )."<br>";
echo english_list( array("foo", "bar", "foobar", "barfoo"), 0 )."<br>";
?>`
memandeemail at gmail dot com
27-Apr-2005 06:06
`/**
* Like implode but with keys
*
* @param string[optional] $glue
* @param array $pieces
* @param string[optional] $hifen
* @return string
*/
function implode_with_key($glue = null, $pieces, $hifen = ',') {
$return = null;
foreach ($pieces as $tk => $tv) $return .= $glue.$tk.$hifen.$tv;
return substr($return,1);
}`
davidpk212 at gmail dot com
14-Apr-2005 08:36
`I made this function to create an english-readable list from an array.
<?php
function english_list($array, $oxfordcomma=1) {
$count = count($array)-1;
$last = $array[$count];
unset($array[$count]);
$str = join(", ", $array);
if ($oxfordcomma) {
$str .= ",";
}
$str .= " and $last";
return $str;
}
?>
The optional parameter "oxfordcomma" indicates whether or not to use the Oxford comma (a comma before the "and").
Example:
<?php
print english_list(array("foo", "bar", "foobar", "barfoo"));
?>
Would produce:
foo, bar, foobar, and barfoo`
01-Apr-2005 06:07
`Here is another varriation on the below code. This is useful if you are trying to store data as a string to be returned to an array later. It allows unlimited nested arrays to be both stored and extracted, but does not print out as pretty.
function implode_assoc_r2($inner_glue = "=", $outer_glue = "\n", $recusion_level = 0, $array = null)
{
$output = array();
foreach( $array as $key => $item )
if ( is_array ($item) )
{
// This is value is an array, go and do it again!
$level = $recusion_level + 1;
$output[] = $key . $inner_glue . $recusion_level . $inner_glue . implode_assoc_r ($inner_glue, $outer_glue, $level, $item, $keepOuterKey);
}
else
$output[] = $key . $inner_glue . $recusion_level . $inner_glue . $item;
return implode($outer_glue . $recusion_level . $outer_glue, $output);
}
function explode_assoc_r2($inner_glue = "=", $outer_glue = "\n", $recusion_level = 0, $string = null)
{
$output=array();
$array=explode($outer_glue.$recusion_level.$outer_glue, $string);
foreach ($array as $value)
{
$row=explode($inner_glue.$recusion_level.$inner_glue,$value);
$output[$row[0]]=$row[1];
$level = $recusion_level + 1;
if(strpos($output[$row[0]],$inner_glue.$level.$inner_glue))
$output[$row[0]] = explode_with_keys_a($inner_glue,$outer_glue,$level,$output[$row[0]]);
}
return $output;
}`
php.net {at} nr78 {dot} net
30-Mar-2005 06:50
`Also quite handy in INSERT statements:
<?php
// array containing data
$array = array(
"name" => "John",
"surname" => "Doe",
"email" => "j.doe@intelligence.gov"
);
// build query...
$sql = "INSERT INTO table";
// implode keys of $array...
$sql .= " (`".implode("`, `", array_keys($array))."`)";
// implode values of $array...
$sql .= " VALUES ('".implode("', '", $array)."') ";
// execute query...
$result = mysql_query($sql) or die(mysql_error());
?>`
stefan
03-Mar-2005 09:47
`Even handier if you use the following:
<?php
$id_nums = array(1,6,12,18,24);
$id_nums = implode(", ", $id_nums);
$sqlquery = "Select name,email,phone from usertable where user_id IN ($id_nums)";
// $sqlquery becomes "Select name,email,phone from usertable where user_id IN (1,6,12,18,24)"
?>`
Geoff Eby
03-Mar-2005 08:29
`A handy use of implode in a MySQL query
<?php
$id_nums = array(1,6,12,18,24);
$id_nums = implode(" OR user_id=", $id_nums);
$sqlquery = "Select name,email,phone from usertable where user_id=$id_nums";
// $sqlquery becomes "Select name,email,phone from usertable where user_id=1 OR user_id=6 OR user_id=12 OR user_id=18 OR user_id=24"
?>`
phpWalter at torres dot ws
14-Sep-2004 11:45
`Chris Ross (17-Aug-2004 11:18) gave us a great function 'implode_assoc'.
But it didn't handle multi-level array.
I know, a few others here added this "feature", but...
I've modified Chirs' function to be recursive.
Hope it helps someone.
/**
* Method to recursivly implode a multi-dimensional array
* Orginal: Chris Ross - 17-Aug-2004
* Modified: Walter Torres - 09-14-2004
**/
function implode_assoc_r($inner_glue = "=", $outer_glue = "\n", $array = null, $keepOuterKey = false)
{
$output = array();
foreach( $array as $key => $item )
if ( is_array ($item) )
{
if ( $keepOuterKey )
$output[] = $key;
// This is value is an array, go and do it again!
$output[] = implode_assoc_r ($inner_glue, $outer_glue, $item, $keepOuterKey);
}
else
$output[] = $key . $inner_glue . $item;
return implode($outer_glue, $output);
}`
Chris Ross
17-Aug-2004 11:18
`I took static's implode_with_keys, and converted into something I considered a little more programatically useful. I would argue that this sort of functionality should maybe be added to PHP.
<?php
/* This isn't really DB function, but it's general... This will */
/* act like the PHP implode() function, but for assoc. arrays... */
function implode_assoc($inner_glue, $outer_glue, $array) {
$output = array();
foreach( $array as $key => $item )
$output[] = $key . $inner_glue . $item;
return implode($outer_glue, $output);
}
?>
It's the same as static's, really, but allows you to join the keys to the values with any arbitrary string, rather than hard-coding a '='.`
john
26-Apr-2004 02:15
`hi,
to prevent implode from putting the zero at the end, I use ksort().
example:
$val[1]="one";
$val[2]="two";
$val[0]="zero";
ksort($val);
echo implode(":",$val);
//will return "zero:one:two"`
chris at hitcatcher dot com
28-Oct-2003 01:50
`I found it neccesary to create a function that joins the contents of a single dimension from a 2-d array. Here's the code in case anyone else should need to do the same:
<?php
function join_2d($glue, $pieces, $dimension = 0){
//joins the values of a single dimension in a 2-d array
$rtn = array();
foreach($piece as $key => $value){
if(isset($value[$dimension])){
$rtn[] = $value[$dimension];
}
}
return join($glue, $rtn);
}
?>
The dimension argument can be a positive integer or a named index. Here is an example:
<?php
$testarray = array(array(1 => 'a', 'three' => 1),
array(1 => 'b', 'three' => 2),
array(1 => 'c', 'three' => 3),
array(1 => 'd', 'three' => 4),
array(1 => 'e', 'three' => 5));
print "<pre>"; print_r($testarray); print "</pre>";
print join_2d(", ", $testarray, 1) . "<br>";
print join_2d(", ", $testarray, 'three') . "<br>";
?>`
dan at danposluns dot com
23-Aug-2003 11:04
`*** MULTI-DIMENSIONAL ARRAY IMPLODE ***
First of all, it should be noted that the function in the previous note is not technically correct, as it glues the outside of the first piece. This is the problem faced by any function that wants to construct a set out of an array without the overhead of handling the boundary indexes. It also doesn't preserve the dimensional architecture.
Use this function when you want to call implode() on a multi-dimensional array and want the resulting string to preserve the architecture of the different dimensions. For example:
array ( 5, array (2, 4, 6), array (3, 6, 9, array (12)))
would be reduced to:
[ 5, [ 2, 4, 6 ], [ 3, 6, 9, [ 12 ] ] ]
Note that this does not preserve key values. If you need those, you are probably better off using serialize() and then replacing the tokens with your own symbols using the string functions.
Anyway, here is the code:
function mdImpode($x, $y)
{
$a = (is_array($x)) ? '[ ' . array_reduce($x, 'mdImplode') . ' ]' : $x;
$b = (is_array($y)) ? '[ ' . array_reduce($y, 'mdImplode') . ' ]' : $y;
return $a . ', ' . $b;
}
Then to call it, use:
$result = '[ ' . array_reduce($pieces, 'mdImplode') . ' ]';
Note that you have to make manual changes if you want different glue or set symbols. There may be a more elegant solution, but this should be a good compromise between efficiency and simplicity (the manual says that array_reduce is iterative, so this should be pretty speedy).`
gregrahkin
19-Jun-2003 10:10
`This function will implode a multi-dimension array
function implode_r ($glue, $pieces){
$out = "";
foreach ($pieces as $piece)
if (is_array ($piece)) $out .= implode_r ($glue, $piece); // recurse
else $out .= $glue.$piece;
return $out;
}`
james at globalmegacorp dot org
30-May-2003 07:13
`As a followup to the implode_with_keys function posted by 'static', here's a corresponding explode_with_keys function I wrote:
function explode_with_keys($seperator, $string)
{
$output=array();
$array=explode($seperator, $string);
foreach ($array as $value) {
$row=explode("=",$value);
$output[$row[0]]=$row[1];
}
return $output;
}`
ulderico at maber dot com dot br
07-Oct-2002 10:39
`'Implode' does not implodes recursively... It might quite useful implode recursively when you get a many Arrays values with keys that replaces themselves as:
http://server/file.php?arg[1]=123&arg[2]=312&arg[3]=543&arg[2]=abc
If you build this URL progressively it would a great a idea that the newest value indeed took the place of any older ones, thus:
http://server/file.php?arg[1]=123&arg[3]=543&arg[2]=abc
would be a better option;
If one uses $_SERVER['REQUEST_URI'], this sanitation would not happen, the URL string would be greater and greater everytime.
With implode_r (see below) it becomes easier to build a "sanitised" URL, the one that less likely will overflow the browser.
$URL = $_SERVER['PHP_SELF'];
$tmp = implode_r("&", $_REQUEST); /* So as to allow to get ANY VALUE (G/P) from the Browser... */
$URL .= "?".$tmp;
/* implode_r */
function implode_r($glue, $array, $array_name = NULL){
while(list($key,$value) = @each($array))
if(is_array($value))
$return[] = implode_r($glue, $value, (string) $key);
else
if($array_name != NULL)
$return[] = $array_name."[".(string) $key."]=".$value;
else
$return[] = $key."=".$value;
return(implode($glue, $return));
}
sorry I couldn't format the code.`
Cedric at isoca dot com
11-Jul-2002 10:39
`Implode with an unset array will made a warning and fail, but is ok with an empty array.
So if you don't trust the content of the array, allways initialize it before :
$param = array();
[...]
echo implode('&', $param);`
static
14-May-2002 12:43
`The one thing missing with this function is a way to add the keys. So I wrote this little function:
function implode_with_keys($glue, $array) {
$output = array();
foreach( $array as $key => $item )
$output[] = $key . "=" . $item;
return implode($glue, $output);
}`
php at woodenpickle dot com
14-Mar-2002 10:55
`Hey, I found a good use for implode() today. It came from a need to have a <select name=state multiple> box on the page that a person could select multiple states from and send those to a >SELECT * FROM customers WHERE state='$state'; query. But they need to be able to send just one state also. Well, I changes the html select box to say <select name=state[] multiple>. This turns $state into an array as you may know. I then, later on in the script, did this:
$count = count( $state );
if( $count > 1 ) {
$states = implode( "'.'", $state );
$result = $database->query( "SELECT * FROM currentOrders WHERE date>=$from AND date <=$to AND state IN ('$states')" );
}
//This takes care of multiple states, but if the user sent only one state, I catch it here:
foreach( $state as $value );
if( $value )
$result = $database->query( "SELECT * FROM currentOrders WHERE date>=$from AND date<=$to AND state='$value'" );
else //This one will catch the ALL states option if they choose that.
$result = $database->query( "SELECT * FROM currentOrders WHERE date>=$from AND date<=$to" );
Anyway, I thought I'd post this up here in case it might help someone. Or maybe someone could figure out a better way and enlighten us all.. Have fun.. Bob`
add a note
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