PHP array_search() Function
Example
Search an array for the value "red" and return its key:
<?php
$a=array("a"=>"red","b"=>"green","c"=>"blue");
echo array_search("red",$a);
?>
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Definition and Usage
The array_search() function search an array for a value and returns the key.
Syntax
array_search(value,array,strict)
| Parameter | Description |
|---|---|
| value | Required. Specifies the value to search for |
| array | Required. Specifies the array to search in |
| strict | Optional. If this parameter is set to TRUE, then this
function will search for identical elements in the array. Possible values:
|
Technical Details
| Return Value: | Returns the key of a value if it is found in the array, and FALSE otherwise. If the value is found in the array more than once, the first matching key is returned. |
|---|---|
| PHP Version: | 4.0.5+ |
| Changelog: | This function returns NULL if invalid parameters are passed to it (this
applies to all PHP functions as of 5.3.0). As of PHP 4.2.0, this function returns FALSE on failure instead of NULL. |
More Examples
Example 1
Search an array for the value 5 and return its key (notice the ""):
<?php
$a=array("a"=>"5","b"=>5,"c"=>"5");
echo array_search(5,$a,true);
?>
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PHP Array Reference
