substr_replace.php : substr_replace « String « PHP

substr_replace.php

 
<?php
   $ccnumber = "1234567899991111";
   echo substr_replace($ccnumber,"************",0,12);
?>

1.	By supplying no start or length arguments, the string will be added to the beginning
2.	PHP has two main functions for performing simple search-and-replace operations. The first one is substr_replace
3.	Replacing Substrings: string substr_replace ( string str, string replacmnt, int start [, int len] )
4.	Replacing a Portion of a String Using substr_replace()
5.	Replacing a substring with substr_replace()
6.	substr_replace() function replaces the string with replacement.