replacing spaces with just one "_"

php codeigniter

Probably the cleanest and most readable solution:

preg_replace('/[[:space:]]+/', '_', $name);

This will replace all spaces (no matter how many) with a single underscore.

php codeigniter

You can accomplish this with a regular expression:

[ ]+

This will match "one or more space characters"; if you want "any whitespace" (including tabs), you can instead use \s+.

Using this with PHP's preg_replace():

$name = preg_replace('/[ ]+/', '_', $name);

php codeigniter

$name = preg_replace('/ +/', '_', $name);

+ in regex means "repeated 1 or more times" hence this will match [SPACE] as well as [SPACE][SPACE][SPACE].

CodeHunter