<?php
//str_replace("Original Value", "Value to be replaced", "String");
$result = str_replace("1", "2", "This is number 1");
// Output: This is number 2
?>str_replace ($search, $replace, $subject);$var1 = 'hello.world';
$var2 = str_replace(".", "-", $var1);
echo $var2; // hello-world
<?php
$string = "Hello PHP";
$replace = str_replace("PHP", "JS", $string);
echo $replace; // Hello JS
?>echo str_replace("worss","world","Hello worss in PHP!!");<?php
$string = str_ireplace("FoX", "CAT", "the quick brown fox jumps over the lazy dog");
echo $string; // the quick brown CAT jumps over the lazy dog
?>