What is PHP mb_stripos() Function?

In this article, we will learn PHP mb_stripos() Function,This free PHP tutorial for complete beginners will help you learn PHP from scratch.

PHP mb_stripos() Function - ❤️PHP Tutorials In 2024

Q: How to use PHP mb_stripos() Function in PHP?

The mb_stripos() function is an inbuilt case-insensitive function that finds the first occurrence of a substring in the string

The mb_stripos() function is an inbuilt case-insensitive function that finds the first occurrence of a substring in the string.

Syntax:

int|false mb_stripos( 
    string $haystack, 
    string $needle, 
    int $offset , 
    ?string $encoding
);

Parameters: This function accepts 4 parameters that are described below.

$haystack: This parameter is the main string parameter where we check the string.
$needle: This parameter is searching string parameter in the main string.
$offset: This parameter is an optional parameter. It is used for defining where you are to start searching string in the $haystack parameter.
$encoding: This parameter is also optional. It is used for defining an encoding by using the mb_internal_encoding() function.

Return Values: This function returns the integer of the first occurrence of $needle in the $haystack parameter. If $needle is not found in the $haystack parameter, it will return “false”.

Program 1: The following code demonstrates the mb_stripos() function.

PHP

<?php 
    
$string = "Hello World"; 
$sub = "WORLD"; 
  
$result = mb_stripos($string, $sub); 
  
if ($result !== false) { 
    echo "Substring '$sub' found in '$string'"; 
} else { 
    echo "Substring '$sub' not found in '$string'"; 
} 
?>

Output

Substring 'WORLD' found in 'Hello World'

Program 2: The following program demonstrates the mb_stripos() function.

PHP

<?php 
  
$string = "This is a test string"; 
$substring = "ing"; 
  
$position = mb_stripos($string, $substring); 
  
// Output the position 
echo $position; 
  
?>

Output

Program 3: The following program demonstrates the mb_stripos() function

PHP

<?php 
    
$string = "She sells seashells by the seashore."; 
$substring = "S"; 
  
$position = 0; 
$occurrences = 0; 
  
while (($position = mb_stripos($string, $substring,  
                            $position)) !== false) { 
    $occurrences++; 
    $position = $position + mb_strlen($substring); 
} 
  
echo "The substring '$substring' was "+ 
     "found $occurrences times in the string."; 
?>

Output

The substring 'S' was found 8 times in the string.

Reference: https://www.php.net/manual/en/function.mb-stripos.php