note 71469 added to function.preg-match
| From: | ElwinvanHuissteden at osu1 dot php dot net | Date: | Thu, 30 Nov 2006 10:05:19 +0000 |
| Subject: | note 71469 added to function.preg-match | ||
| Groups: | php.notes | ||
| Request: | Send a blank email to php-notes+get-120183@lists.php.net to get a copy of this message | ||
Searching for a way to figure out how to make patterns in the preg_match command, I tried figuring
out any piece of the patterns of others, and came to some conclusions... to try something out, i
tried to make a pattern that could read if a backslash ( \ ) was used before a single quote ( '
). I ended up with a pattern that read if any quotes where there at all, in any way possible.
Maybe people could also use this, but if you see what i did wrong, please do tell me:
<?php
$string1 = "a \'quoted\' \"string\"";
$string2 = "a 'quoted' string";
$string3 = "a 'quoted' "string"";
$string4 = "a not-quoted string";
if (preg_match("/[\\'!']|[\\\"!\"]/",$string1)) {
echo $string1.' wrong way'."\n";
} else {
echo $string1.' right way'."\n";
}
// returns: a \'quoted\' "string" wrong way
if (preg_match("/[\\'!']|[\\\"!\"]/",$string2)) {
echo $string2.' wrong way'."\n";
} else {
echo $string2.' right way'."\n";
}
// returns: a 'quoted' string wrong way
if (preg_match("/[\\'!']|[\\\"!\"]/",$string3)) {
echo $string3.' wrong way'."\n";
} else {
echo $string3.' right way'."\n";
}
// returns: a 'quoted' "string" right way
if (preg_match("/[\\'!']|[\\\"!\"]/",html_entity_decode($string3))) {
echo html_entity_decode($string3).' wrong way'."\n";
} else {
echo html_entity_decode($string3).' right way'."\n";
}
// returns: a 'quoted' "string" wrong way
if (preg_match("/[\\'!']|[\\\"!\"]/",$string4)) {
echo $string4.' wrong way'."\n";
} else {
echo $string4.' right way'."\n";
}
// returns: a not-quoted string right way
?>
----
Server IP: 83.137.20.120
Probable Submitter: 82.92.27.234
----
Manual Page -- http://www.php.net/manual/en/function.preg-match.php
Edit -- https://master.php.net/note/edit/71469
Del: integrated -- https://master.php.net/note/delete/71469/integrated
Del: useless -- https://master.php.net/note/delete/71469/useless
Del: bad code -- https://master.php.net/note/delete/71469/bad+code
Del: spam -- https://master.php.net/note/delete/71469/spam
Del: non-english -- https://master.php.net/note/delete/71469/non-english
Del: in docs -- https://master.php.net/note/delete/71469/in+docs
Del: other reasons-- https://master.php.net/note/delete/71469
Reject -- https://master.php.net/note/reject/71469
Search -- https://master.php.net/manage/user-notes.php