I need to convert an array such as this:
$arr = array(1, 2, 3) ;
to this format:
arr[0]=1&arr[1]=2&arr[2]=3
is there any built in function in php or i must create this my self?
2 Answers
expected output should require key name in input data array, see below and after that use http_build_query() function to created query string
<?php
$arr = array("arr" => array(1, 2, 3)) ;
echo http_build_query($arr);
?>
encode output default
arr%5B0%5D=1&arr%5B1%5D=2&arr%5B2%5D=3
and if you need decode output then
<?php
$arr = array("arr" => array(1, 2, 3)) ;
echo urldecode(http_build_query($arr));
?>
arr[0]=1&arr[1]=2&arr[2]=3
Comments
You can use http_build_query but with little tweak:
<?php
$arr = array(1, 2, 3);
$arr = http_build_query($arr,"arr[");
echo preg_replace('/\[\d/', '\\0]', $arr);
Output:
arr[0]=1&arr[1]=2&arr[2]=3
here is demo
Alternatively, you can also use:
<?php
$arr = array(1, 2, 3);
foreach ($arr as $key => $value) {
$serialized[] = "arr[$key]=$value";
}
echo implode("&",$serialized);
As mentioned by @Bob0t in comments, he says its faster :)
1 Comment
Bobot
ahah, nice trick, btw a foreach loop will be more efficient on processing time :p
foreach ($arr as $key => $value) { $queryString[] = "arr[$key]=$value"; } echo implode("&",$queryString);