PHP - str_replace example

Syntax

str_replace($find, $replace, $string, $count)

Example 1

$string = 'Hello world!';
$find = 'world!';
$replace = 'foo bar!';
$result = str_replace($find, $replace, $string);
echo $result;
// output
// Hello foo bar

Example 2

$string = 'Hello world!';
$find = 'o';
$replace = '';
$result = str_replace($find, $replace, $string, $count);
print_r($count);
// output
// 2