Question

How to replace text with any text and symbols in replacement? Because when i use backslash it`s badly replaced.

$text = 'hello replacement world';

$text = preg_replace('#replacement#ui', '28\01\12', $text);

Result

hello 28 world

Solution to do replace before using pattern

$pattern = '28\01\12';
$pattern = str_replace('\\', '\\\\\\\\', $pattern);

This is just expample, in real work need to use more complicated pattern and replacement will consist any text

Answer 1

$text = preg_replace('#replacement#ui', '28\\01\\12', $text);

See the notes here on backslashes: http://php.net/manual/en/language.types.string.php

If you’re just searching for a simple string to replace, you should consider using str_replace() instead. It’s less expensive cpu-wise. See here: http://php.net/manual/en/function.str-replace.php

UPDATE: More info on escape sequences: http://www.php.net/manual/en/regexp.reference.escape.php