Can't get str_replace() to strip out spaces in a PHP string

Question

Hi, I am getting a PHP string which I need to strip the spaces out of. I have used the following code but when I echo $classname it just displays the string still with the spaces in it.

   <?php
     $fieldname = the_sub_field('venue_title');
     $classname = str_replace(' ', '', $fieldname);
     echo $classname;
   ?>

Solution 1

Try to add u-parameter for regex-pattern, because a string can have UTF-8 encoding:

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

Solution 2

If you know the white space is only due to spaces, you can use:

$classname = str_replace(' ','',$fieldname ); 

But if it could be due to space, you can use:

$classname = preg_replace('/\s+/','',$fieldname )

Solution 3

The problem might be the character not being a space, but another whitespace character.

Try

$classname = preg_replace('/\s/', '', $fieldname);

Solution 4

use trim like this

TRIM($fieldname);

EDIT:

preg_replace('/\s+/', '', $fieldname);

Solution 5

The issue was the field that it was pulling, not the rest of the php. 'the_sub_field('venue_title')' pulls a field from the wordpress plugin 'Advanced Custom Fields' but this function is intended to display the data rather than just retrieve it. Instead i used 'get_sub_field('venue_title')' and it worked. cheers for the help

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Comments

[billyonecan]

trim() will only remove whitespace from the start and end of the string

[ty812]

'trim()' only trims at the beginning or the end of a string. In Paul's example, whitespace characters might be within the string.

[Paul Elliot]

I think the issue is that the string is not getting treated as a string. it needs a " on either side. how would you do this in php? eg $fieldname = "'" . the_sub_field('venue_title') . "'";

[Blu]

use " ". the_sub_field('venue_title')."" or maybe ""+the_sub_field('venue_title')+""

[JackSD]

This is the correct answer to this threat and needs to be marked so

[Artur Czyżewski]

Same here. String was retrived from Wordpress meta field. Was saved in admin panel, after "copy-paste" from old site, with different encoding...

[Martin]

Try substituting the \s+ for \h+ for horizontal whitespace, this will retain line breaks, if needed.

[Adrien G]

you are the real mvp

[Thanasis]

That did the trick