change character php code example

Example 1: php replace return character

$string = str_replace("\n", "", $string);
$string = str_replace("\r", "", $string);

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);

Example 3: replace all numbers in string php

$words = preg_replace('/[0-9]+/', '', $words);