CODEWITHSUNDEEP
php
Marian Rick
Marian Rick

Reputation: 3440

Combine preg _replace and strtolower

I try to combine strtolower and preg_replace, but I am not sure how to nest it. I have tried it like so:

$res = strtolower(preg_replace("/[^a-zA-Z]/", "", $string));

I found this solution but cannot get it to work. I want a lowercase string without special characters:

I am some special-content

turns into

iamsomespecialcontent

How can I achieve this and store it inside $res?

Upvotes: 0

Views: 384

Answers (2)

Exception
Exception

Reputation: 787

Well I can say first step will be making string as lowercase 

$rest = strtolower($string);

And then removing white spaces

$rest = preg_replace("/\s+/", "", $rest);

You can combine it as -

$rest = preg_replace("/\s+/", "", strtolower($rest));

For more special character related solution you can try this

Upvotes: 1

Jens A. Koch
Jens A. Koch

Reputation: 41776

Its better to split this into a two-liner and debug the output of the commands with var_dump() in order to see whats going on:

<?php

/* string with special chars */
$string = 'abczABCZ-#+´!"§123';

$no_special_chars = preg_replace("/[^a-zA-Z]/", "", $string); 

var_dump($no_special_chars);    // string 'abczABCZ' (length=8)   

$lowercased = strtolower($no_special_chars);

var_dump($lowercased);          // string 'abczabcz' (length=8)

And maybe you noticed, that you don't have to handle A-Z in the preg_replace(), if you lowercase the string first.

$res = preg_replace("/[^a-z]/", "", strtolower($string));

var_dump($res); // string 'abczabcz' (length=8)

Upvotes: 1

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