cut string after character php code example

Example 1: get the string after a character in php

$data = "123_String";    
$whatIWant = substr($data, strpos($data, "_") + 1);    
echo $whatIWant;

Example 2: php remove everything after character

$fullpath = 'folderName/file.ext';
$folder = substr($fullpath, 0, strpos($fullpath, '/'));
echo $folder;
// Output => folderName

Example 3: php remove after character

$s = 'Posted On April 6th By Some Dude';
echo strstr($s, 'By', true); // Posted On April 6th

Example 4: get substring after character php

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