PHP searches for the given simple instance array_search function in the array, array array_search_PHP tutorial

PHP searches for the given simple instance array_search function in the array, array array_search. PHP searches for the given simple instance array_search function in the array. the array array_searcharray_search () PHParray_search () function is used to search for the given value in the array, if it succeeds, return to PHP to search for the given simple instance array_search function in the array, array array_search

Array_search ()

The PHP array_search () function is used to search for a given value in the array. if the value is successful, the corresponding key name is returned. otherwise, FALSE is returned.

Syntax:

Mixed array_search (mixed needle, array [, bool strict]) parameter description:

Parameters	Description
Needle	The value to be searched in the array. if it is a string, it is case sensitive.
Array	Array to be retrieved
Strict	Optional. If this parameter is set to TRUE, the needle and array value types are checked.

Because the starting index number of the index array may be 0, this function may return non-Boolean values equivalent to FALSE, such as 0 or "", therefore, you must use the = operator to strictly verify the value returned by the function.

Example:

<? Php $ arr_a = array (0 => "a", 1 => "B", 2 => "c"); $ key = array_search ("", $ arr_a); if ($ key! = FALSE) {echo "key name: $ key";} else {echo 'no matching result';}?>

The output result is as follows:

Key name: 0 if needle appears more than once in array, the first matched Key is returned. To return keys of all matched values, use the array_keys () function.

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