How would I go about detecting whitespace between strings? For example, I have a name string like:
"Jane Doe"
Keep in mind that I don't want to trim or replace it, just detect if whitespace exists between the first and second string.
2
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1hi i just want to ask, is ctype_space ( string $text ) in the phpmanual php.net/manual/en/function.ctype-space.php will not work to detect the whitespace?user1149244– user11492442012-08-31 10:19:13 +00:00Commented Aug 31, 2012 at 10:19
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Does this answer your question? PHP check if string contains space between words (not at beginning or end)Vega– Vega2022-06-11 09:33:38 +00:00Commented Jun 11, 2022 at 9:33
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6 Answers
Use preg_match as suggested by Josh:
<?php
$foo = 'Bob Williams';
$bar = 'SamSpade';
$baz = "Bob\t\t\tWilliams";
var_dump(preg_match('/\s/',$foo));
var_dump(preg_match('/\s/',$bar));
var_dump(preg_match('/\s/',$baz));
Ouputs:
int(1)
int(0)
int(1)
2 Comments
Decebal
if we talk about web, use the KISS method please, you don't want to start the regex engine just to justify lazyness
Wouldn't preg_match("/\s/",$string) work? The advantage to this over strpos is that it will detect any whitespace, not just spaces.
You could check for only alphanumerical characters, which whitespace is not. You could also do a strpos for a space.
if(strpos($string, " ") !== false)
{
// error
}
6 Comments
ThoKra
You want it like strpos($string, " ") instead. Haystack first, then needle
hobodave
As stated by Josh, this is not a valid answer to the OP question. The OP wanted to detect "whitespace" not "spaces".
Josh
The author's name is even "lacking preg_match". LOL.
Tyler Carter
Why couldn't they standardize how needle/haystack functions take arguments. Should always have one first.
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You may use something like this:
if (strpos($r, ' ') > 0) {
echo 'A white space exists between the string';
}
else
{
echo 'There is no white space in the string';
}
This will detect a space, but not any other kind of whitespace.
Comments
<?php
if(strpos('Jane Doe', ' ') > 0)
echo 'Including space';
else
echo 'Without space';
?>
// returns no. of matches if $str has nothing but alphabets,digits and spaces.
function is_alnumspace($str){
return preg_match('/^[a-z0-9 ]+$/i',$str);
}
2 Comments
tchrist
[a-z] does not cover alphabetic characters.
mickmackusa
This answer has nothing to do with the asker's requirements.