If string only contains spaces?

Question

How can i check to see if a string only contains spaces?

Answer 1

if (strlen(trim($str)) == 0) 

or if you don't want to include empty strings,

if (strlen($str) > 0 && strlen(trim($str)) == 0) 

Answer 2

from: https://stackoverflow.com/a/2992388/160173

If you want to upvote, do it on the other answer, not this one!

---

This will be the fastest way:

$str = '      '; if (ctype_space($str)) {  } 

Returns false on empty string because empty is not white-space. If you need to include an empty string, you can add || $str == '' This will still result in faster execution than regex or trim.

ctype_space

---

as a function:

function stringIsNullOrWhitespace($text){     return ctype_space($text) || $text === "" || $text === null; } 

Answer 3

echo preg_match('/^ *$/', $string)

Should work.

Answer 4

check if result of trim() is longer than 0

Answer 5

Use a regular expression:

$result = preg_match('/^ *$/', $text);

If you want to test for any whitespace, not just spaces:

$result = preg_match('/^\s*$/', $text);

Answer 6

I think using regexes is overkill, but here's another sol'n anyway:

preg_match('`^\s*$`', $str)

Answer 7

another way

preg_match("/^[[:blank:]]+$/",$str,$match);