array() Function
PHP in_array() Function
Complete PHP Array Reference
Definition and Usage
The in_array() function searches an array for a specific value.
This function returns TRUE if the value is found in the array, or FALSE
otherwise.
Syntax
in_array(search,array,type)
search
Required. Specifies the what to search for
array
Required. Specifies the array to search
type
Optional. If this parameter is set, the in_array() function
searches for the search-string and specific type in the array
Tips and Notes
Note: If the search parameter is a string and the type parameter is
set to TRUE, the search is case-sensitive.
Example 1
<?php
$people = array("Peter", "Joe", "Glenn", "Cleveland");
if (in_array("Glenn",$people))
{
echo "Match found";
}
else
{
echo "Match not found";
}
?>
The output of the code above will be:
Match found
Example 2
<?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 />";
}
?>
The output of the code above will be:
Match not found
Match found
Match found
Complete PHP Array Reference
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