PHP : Converts double slashes in a string to a single slash

In this tutorial learn how to Converts double slashes in a string to a single slash, except those found in http:// ,

http://www.example.com//index.php 

becomes: 

http://www.example.com/index.php

Tutorial

PHP : Check if a string contains a substring

In this this tutorial learn How to Check if a string contains a substring in php using a strpos() method - programming technology world

function str_contains(string $string, string $substr): bool
{
    return strpos($string, $substr) !== false;
}

PHP : Check if a string ends with a substring

In this tutorial learn how to Check if a string ends with a substring in php using stripos() and strlen() methods.

function str_ends_with(string $string, string $substr): bool
{
    return stripos($string, $substr) === strlen($string) - strlen($substr);
}

PHP : Check if a string starts with a substring

In this tutorial learn how to Check if a string starts with a substring in php using strpos() method.

function str_starts_with(string $string, string $substr): bool
{
    return strpos($string, $substr) === 0;
}