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# in_array

in_array -- Return true if a value exists in an array

## Description

`bool in_array`(mixed needle, array haystack);

Searches `haystack` for `needle` and returns true if it is found in the array, false otherwise.

Example 1. in_array() example
      1
      2 $os = array ("Mac", "NT", "Irix", "Linux");
      3 if (in_array ("Irix", $os))
      4     print "Got Irix";
      5

> Note: This function was added in PHP 4.0.

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