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PHP Functions
Function: in_array (PHP 4, PHP 5) in_array -- Checks if a value exists in an arrayDescriptionbool 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() function will also check the types of the needle in the haystack . Note: If needle is a string, the comparison is done in a case-sensitive manner. Note: In PHP versions before 4.2.0 needle was not allowed to be an array.
Example 1. in_array() example <?php $os = array("Mac", "NT", "Irix", "Linux"); if (in_array("Irix", $os)) { echo "Got Irix"; } if (in_array("mac", $os)) { echo "Got mac"; } ?> The second condition fails because in_array() is case-sensitive, so the program above will display: Got Irix
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"; } ?> The above example will output: 1.13 found with strict check
Example 3. in_array() with an array as needle <?php $a = array(array('p', 'h'), array('p', 'r'), 'o'); if (in_array(array('p', 'h'), $a)) { echo "'ph' was found\n"; } if (in_array(array('f', 'i'), $a)) { echo "'fi' was found\n"; } if (in_array('o', $a)) { echo "'o' was found\n"; } ?> The above example will output: 'ph' was found 'o' was found Related Function(s) |