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PHP Functions

Function: strripos

(PHP 5)

strripos --  Find position of last occurrence of a case-insensitive string in a string

Description

int strripos ( string haystack, string needle [, int offset] )

Returns the numeric position of the last occurrence of needle in the haystack string. Unlike strrpos() , strripos() is case-insensitive. Also note that string positions start at 0, and not 1.

Note that the needle may be a string of one or more characters.

If needle is not found, FALSE is returned.

Warning

This function may return Boolean FALSE , but may also return a non-Boolean value which evaluates to FALSE , such as 0 or "". Please read the section on Booleans for more information. Use the === operator for testing the return value of this function.

Example 1. A simple strripos() example

<?php
$haystack = 'ababcd';
$needle   = 'aB';

$pos      = strripos($haystack, $needle);

if ($pos === false) {
    echo "Sorry, we did not find ($needle) in ($haystack)";
} else {
    echo "Congratulations!\n";
    echo "We found the last ($needle) in ($haystack) at position ($pos)";
}
?>

Outputs:

Congratulations!
   We found the last (aB) in (ababcd) at position (2)

The offset parameter may be specified to begin searching an arbitrary number of characters into the string.

Negative offset values will start the search at offset characters from the start of the string.

Related Function(s)

  • strrpos()
  • strrchr()
  • substr()
  • stripos()
  • stristr()
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