Php replace the last space in the label

Question

I have this string :

[{"type":"date","label":"Champ Date de ","className":"form-control","name":"date-1545926599900"}]

I need to delete the last space from the label, the actual value is "Champ Date de " i need to convert it as "Champ Date de".

Here my actual code :

        $form = str_replace('\n','',$request->getParameter('data'));
        $form = str_replace('\t','',$form);
        $form = str_replace('&nbsp;','',$form);
        $form = str_replace('<br>','',$form);
        var_dump($form); die;

The problem come from the
: str_replace('<br>','',$form);

with   i have no problem and the function str_replace do not add a space. but with <br> the str_replace add a space add i really need to have any space at the end of this value. hope someone could help.

I could have multiple array :

'[{"type":"date","label":"Champ Date de ","className":"form-control","name":"date-1545929424866"},{"type":"checkbox-group","label":"You like it ? ","name":"checkbox-group-1545929428281","values":[{"label":"Option 1","value":"1","selected":true}]}]'

Try [`trim()`](http://us1.php.net/manual/en/function.trim.php), it will remove all white space from the beginning and the end, except for the `
` — aynber, Dec 27 '18 at 16:29
yes i tried but when i do that i get "ChampDatede" instead of "Champ Date de" — Mathieu Mourareau, Dec 27 '18 at 16:30
Though, if you're trying to trim it from the middle of the json, it would be better to use `json_decode`, then go through and trim all the values. — aynber, Dec 27 '18 at 16:32
Is there any issue with `json_decode()`-ing it, target the value your wish to trim, apply `trim()`, and `json_encode()` it back to a string? — MonkeyZeus, Dec 27 '18 at 16:33
I think you are getting the string without space because of all those `str_replace` you are using — DaFois, Dec 27 '18 at 16:33
Did you try [``rtrim``](http://www.php.net/manual/en/function.rtrim.php) ? It remove only spaces at the end of your string — Fanie Void, Dec 27 '18 at 16:34
`str_replace` can use an array, so you only need one call. Do you have the literal characters in your string? `\n` in single quotes is just that, in double quotes it is a new line. Probably https://stackoverflow.com/questions/53948015/php-replace-the-last-space-in-the-label#comment94734596_53948015 is the best idea — user3783243, Dec 27 '18 at 16:34

A l w a y s S u n n y · Accepted Answer · 2018-12-28T01:38:06.347

How about this non-regex way with array_map('trim',$array);?

<?php
$json = '[{"type":"date","label":"Champ Date de ","className":"form-control","name":"date-1545926599900"}]';
$array = json_decode($json,1)[0];
$array= array_map('trim',$array);
echo json_encode([$array]);
?>

Output:

[{"type":"date","label":"Champ Date de","className":"form-control","name":"date-1545926599900"}]

DEMO: https://3v4l.org/qJ9K1

EDIT: As per OP's comment

<?php
$json = '[{"type":"date","label":"Champ Date de ","className":"form-control","name":"date-1545929424866"},{"type":"checkbox-group","label":"You like it ? ","name":"checkbox-group-1545929428281","values":[{"label":"Option 1","value":"1","selected":true}]}]';
$array = json_decode($json,1);
$expected = [];
foreach($array as $k=>$v){
    foreach($v as $key=>$value){
        if($key == 'label' && !is_array($value)){
          $expected[$k][$key]= trim($value); 
       }else{
          $expected[$k][$key]= $value; 
       }
    }
}

echo json_encode($expected);
?>

DEMO: https://3v4l.org/NRlsR

thanks for your reply it's working but i can have multiple array. i update the post with the exemple with multiple array — Mathieu Mourareau, Dec 27 '18 at 16:51
@MathieuMourareau then you can do it using 2 `foreach()`. See my edit and let me know is that worked for you or not now? — A l w a y s S u n n y, Dec 28 '18 at 01:39

score 0 · Answer 2 · answered Dec 27 '18 at 18:04

You can do it without loop by using regex Here is the solution:

$string = '[{"type":"date","label":"Champ Date de ","className":"form-control","name":"date-1545929424866"},{"type":"checkbox-group","label":"You like it ? ","name":"checkbox-group-1545929428281","values":[{"label":"Option 1","value":"1","selected":true}]}]';
$pattern = '/("label":"([\w\s])+)/m';
echo preg_replace_callback($pattern, function($match) {return trim($match[0]);}, $string);

I have done echo for the result. You just need to assign it to a variable.

Php replace the last space in the label

2 Answers2