(PHP 4 >= 4.0.0)
in_array -- Return
TRUE if a value exists in an array
Description
bool in_array (mixed needle, array haystack [, bool
strict])
Searches haystack for
needle and returns TRUE
if it is found in the array, FALSE otherwise.
If the third parameter strict is set to
TRUE then the in_array()
will also check the types of the needle
in the haystack.
Example 1. in_array() example
$os = array ("Mac", "NT", "Irix", "Linux");
if (in_array ("Irix", $os)) {
print "Got Irix";
}
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Example 2. in_array() with strict example
<?php
$a = array('1.10', 12.4, 1.13);
if (in_array('12.4', $a, TRUE))
echo "'12.4' found with strict check\n";
if (in_array(1.13, $a, TRUE))
echo "1.13 found with strict check\n";
?>
// This will output:
1.13 found with strict check
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See also array_search().