The str_replace() function replaces some characters with some other characters in a string. This function works by the following rules:
- If the string to be searched is an array, it returns an array.
- If the string to be searched is an array, find and replace is performed with every array element.
- If both find and replace are arrays, and replace has fewer elements than find, an empty string will be used as replace.
- If find is an array and replace is a string, the replace string will be used for every find value.
<?php echo str_replace("world","India!","Hello world"); ?>