Array_search () Definition and usage
The Array_search () function, like In_array (), looks for a key value in the array. If the value is found, the key name of the matching element is returned. Returns False if it is not found.
Before PHP 4.2.0, the function returned null instead of false on failure.
If the third parameter, strict, is specified as true, the key name of the corresponding element is returned only if the data type and value are consistent.
Grammar
Array_search (value,array,strict) parameter description
Value is required. Specifies the value to search for in the array.
Array required. The array to be searched.
Strict is optional. Possible values:
True
False-Default
If the value is set to True, the type of the given value is also checked in the array. (see Example 2)
Example 1
Copy CodeThe code is as follows:
$a =array ("a" = "Dog", "b" = "Cat", "C" and "Horse");
Echo Array_search ("Dog", $a);
?>
Output:
A
http://www.bkjia.com/PHPjc/324437.html www.bkjia.com true http://www.bkjia.com/PHPjc/324437.html techarticle Array_search () defines and uses the Array_search () function, like In_array (), to find a key value in the array. If the value is found, the key name of the matching element is returned. If not found ...
