CODEWITHSUNDEEP
php
user740521
user740521

Reputation: 1204

preg_replace all spaces

I'm trying to replace all spaces with underscores and the following is not working:

$id = "aa aa";
echo $id;
preg_replace('/\s+/', '_', $id);
echo $id;

prints

aa aaaa aa

Upvotes: 27

Views: 92778

Answers (6)

Julesezaar
Julesezaar

Reputation: 3406

If you have a problem removing all spaces it is because /\s+/ does not match the \u00A0 space

To be sure, always add the "u" after the delimiter, for all unicode spaces and to catch the \u00A0 space too

$text = preg_replace('/\s+/u', '', $text);

Upvotes: 0

Mahesh Mohan
Mahesh Mohan

Reputation: 113

Sometimes, in linux/unix environment, 

$strippedId = preg_replace('/\h/u', '',  $id);

Try this as well.

Upvotes: 8

web_developer
web_developer

Reputation: 81

We need to replace the space in the string "aa aa" with '_' (underscore). The \s+ is used to match multiple spaces. The output will be "aa_aa" 

<?php

$id = "aa aa";
$new_id = preg_replace('/\s+/', '_', $id);
echo $new_id;

?>

Upvotes: 2

Clive
Clive

Reputation: 36965

I think str_replace() might be more appropriate here:

$id = "aa aa";
$id = str_replace(' ', '_', $id);
echo $id;

Upvotes: 17

Mark Byers
Mark Byers

Reputation: 839184

The function preg_replace doesn't modify the string in-place. It returns a new string with the result of the replacement. You should assign the result of the call back to the $id variable:

$id = preg_replace('/\s+/', '_', $id);

Upvotes: 69

Martin.
Martin.

Reputation: 10539

You have forgotten to assign the result of preg_replace into your $id

$id = preg_replace('/\s+/', '_', $id);

Upvotes: 13

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