Regex for White Space OR Punctuation

[member123]

Can someone help me develop a regex that will work for a word followed by either whitespace or a punctuation mark?  Thanks.

[MadTechie]

wrong section, try the regex section

 

also if you need help with something we need to see what you have so far!

 

also what punctuation marks ?

 

heres an example

(\w)

 

hyphenated words example

(\w+(?:-)?(?:\w+)?(?:\.|\?|\w|\')+)

[member123]

Right now I have preg_match('/' . preg_quote($variant, '/') . '/', $shebang

 

I am looking for words that are used as $variant in a block of text.  I also used

 

preg_match('/' . preg_quote($variant, ' /') . '/', $shebang and it worked nicely, except it can't spot the words if they are at the end of a sentence or in front of a comma or whatever because of the ' /' section.

 

I would like to modify it so that it words with a space or a comma, period, exclamation point, question mark, etc.

[MadTechie]

try this

 

preg_match('/' . preg_quote($variant, '/') . '(?:\s|\?|,|!|\'|"|\.)?/', $shebang

[member123]

try this

 

preg_match('/' . preg_quote($variant, '/') . '(?:\s|\?|,|!|\'|"|\.)?/', $shebang

 

Thanks for the help MadTechie.  However, I'm still getting the same problem, even with that code.  If $variant is App, words like Apple still get picked up.  Also should any of those backslashes be double backslashes?

 

Thanks.

[MadTechie]

ahh okay try this

preg_match('/^' . preg_quote($variant, '/') . '(?:\s|\?|,|!|\'|"|\.)?$/', $shebang

[member123]

ahh okay try this

preg_match('/^' . preg_quote($variant, '/') . '(?:\s|\?|,|!|\'|"|\.)?$/', $shebang

 

I got it working by getting rid of that question mark at the end and having a double backslash in front of the s.  Thanks for the help.

 

I'm still not exactly clear on where the double backslashes are needed.

[MadTechie]

without last ? does the end word work ?

 

whats the problem with the backslashes ?

[effigy]

'/^' . preg_quote($variant) . '(?=\s|\p{P}|\z)/'

[member123]

For some reason that code gave me a lot of "unknown modifier" errors.  Can you please tell me what the difference is between that and the above code?  Thanks.

[effigy]

It encompasses punctuation in the complete sense, and, in my opinion, is cleaner.

 

<pre>
<?php

$tests = array(
	'Word',
	'Word ',
	'Word!',
	'Word, etc.',
	'Wordxyz',
);
$variant = 'Word';
$pattern = '/^' . preg_quote($variant) . '(?=\s|\p{P}|\z)/';
foreach ($tests as $test) {
	echo "$test: ", preg_match($pattern, $test) ? 'OK' : 'Invalid', '<br>';
}
?>
</pre>

 

Word: OK

Word : OK

Word!: OK

Word, etc.: OK

Wordxyz: Invalid

[corbin]

<?php
$words = array(
'Corbin',
'!Corbin!',
'Corbin1',
'Corbin was here',
"Corbin\r\n",
"Corbin ",
"I am Corbin",
);

$search = "Corbin";

$search_e = preg_quote($search);

foreach($words as $word) {
if(preg_match("/\b{$search_e}\b/i", $word)) {
	echo "{$word} is valid.\r\n";
}
}

?>

/*
Corbin is valid.
!Corbin! is valid.
Corbin was here is valid.
Corbin
is valid.
Corbin  is valid.
I am Corbin is valid.
*/

 

Will a simple word boundry work?

 

http://www.regular-expressions.info/wordboundaries.html