w3resource

PHP: strripos() function

Description

The strripos() function is used to find the position of the last occurrence of a case-insensitive string in a string.

Version:

(PHP 5)

Syntax:

strripos(main_string, search_string, start_position)

Parameters:

Name Description Required /
Optional 		Type
main_string Specifies the string to examined. Required String
search_string Specifies the string to search with. Required String
start_position Sets the starting position of the first string. Optional Integer

Return value:

Returns the numerical position of the last occurrence of seacrh_string.

Value Type: Integer.

Pictorial Presentation

string_strripos

Example: 

<?php$main_string='w3resource.com';echo strripos($main_string, 'COM');?>

Output:

11

View the example in the browser

See also

PHP Function Reference

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PHP: Tips of the Day

PHP: Using str_replace so that it only acts on the first match?

Can be done with preg_replace: 

function str_replace_first($from, $to, $content)
{
    $from = '/'.preg_quote($from, '/').'/';

    return preg_replace($from, $to, $content, 1);
}

echo str_replace_first('abc', '123', 'abcdef abcdef abcdef'); 
// outputs '123def abcdef abcdef'

The magic is in the optional fourth parameter [Limit]. From the documentation:

[Limit] - The maximum possible replacements for each pattern in each subject string. Defaults to -1 (no limit).

Ref : https://bit.ly/35SCuP8