php replace char in string in string code example

Example 1: str_replace php variable

$var1 = 'hello.world';
$var2 = str_replace(".", "-", $var1);
echo $var2; // hello-world

Example 2: php replace every occurrence of character in string

//replaces every occurence of $search with $replace in the string $subject
str_replace ($search, $replace, $subject);