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PHP in_array() Function

PHP Array Reference PHP Array Reference

Example

Search for the value "Glenn" in an array and output some text:

<?php
$people = array("Peter", "Joe", "Glenn", "Cleveland");

if (in_array("Glenn", $people))
  {
  echo "Match found";
  }
else
  {
  echo "Match not found";
  }
?>

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Definition and Usage

The in_array() function searches an array for a specific value.

Note: If the search parameter is a string and the type parameter is set to TRUE, the search is case-sensitive.


Syntax

in_array(search,array,type)

Parameter Description
search Required. Specifies the what to search for
array Required. Specifies the array to search
type Optional. If this parameter is set to TRUE, the in_array() function searches for the search-string and specific type in the array.

Technical Details

Return Value: Returns TRUE if the value is found in the array, or FALSE otherwise
PHP Version: 4+
Changelog: As of PHP 4.2, the search parameter may now be an array

More Examples

Example 1

Using all parameters:

<?php
$people = array("Peter", "Joe", "Glenn", "Cleveland", 23);

if (in_array("23", $people, TRUE))
  {
  echo "Match found<br>";
  }
else
  {
  echo "Match not found<br>";
  }
if (in_array("Glenn",$people, TRUE))
  {
  echo "Match found<br>";
  }
else
  {
  echo "Match not found<br>";
  }

if (in_array(23,$people, TRUE))
  {
  echo "Match found<br>";
  }
else
  {
  echo "Match not found<br>";
  }
?>

Run example »

PHP Array Reference PHP Array Reference

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