Remove space/spaces between two words

I want this out come

Input              =|= Output  
=============================开发者_如何学JAVA================
[b] [/b]           =|= [b][/b]
[b]      [/b]      =|= [b][/b]
[b]Hii[/b]         =|= [b]Hii[/b]  
[b]Hello There[/b] =|= [b]Hello There[/b]

I think the only way to solve this problem is regex which i dont know to write, so looking for help

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input = input.replace(/\[b\]\s+\[\/b\]/ig, '[b][/b]');

Demo →

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For JavaScript:

input = input.replace(/\[b\](?: |\s)+?\[\/b\]/gi, '[b][/b]');

For PHP:

$input = preg_replace('/\[b\](?: |\s)+?\[\/b\]/i', '[b][/b]', $input);

The above includes   since the example formerly showed that. If there is no need, just use:

For JavaScript:

input = input.replace(/\[b\]\s+?\[\/b\]/gi, '[b][/b]');

For PHP:

$input = preg_replace('/\[b\]\s+?\[\/b\]/i', '[b][/b]', $input);

But these will only catch empty whitespace not trailing.

To catch trailing...

For JavaScript:

input = input.replace(/\[b\](.+?)\[\/b\]/gi, function (n0, n1) {
    return '[b]' + n1.replace(/^\s+|\s+$/g, '') + '[/b]';
});

For PHP:

$input = preg_replace_callback('/\[b\](.+?)\[\/b\]/i', 
    create_function(
        '$m',
        'return "[b]".trim($m[1])."[/b]";'
    ), 
    $input);

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input.replace(/\s+/g,'') will take out all spaces (which it sounds like what you are trying to do) even though your last example confuses me

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Um.. I think I get what you mean when I read your question, but your example confused me a lot. You have both PHP & Javascript written... IF you wanna do this is PHP use preg_replace() $str = 'the value you want to parse';

$new_value = preg_replace('/\s\s+/', '', $str);

Hope this helps! :)

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This should do it:

preg_replace ("/\s+/", "\s", $subject);
preg_replace ("/\]\s+\[/", "\]\[", $subject);

It could be done with a single regex, but it's much easier to understand in 2 passes.

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It seems like you are trying to get rid of the spaces before and after your string only.

In php there is a native function that does just that

trim() Read here

Here is an example:

$string = ' Hello World!      ';

$trimmed = trim($string);

echo $trimmed;
// will print 'Hello World'