get string from specific character in php code example

Example 1: php get first 5 characters of string

$result = substr("Hello How are you", 0, 5); //first 5 chars "Hello"

Example 2: get substring after character php

<?php
$my_url = 'http://www.example.com/5478631';
echo substr($my_url, strrpos($my_url, '/' )+1)."\n";
?>
  // print: 5478631