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I have a function that builds a regex based on an array. The problem is that PHP keeps adding backslashes to some of the characters, and it keeps messing up the regex.
Here is my function:
private static $allowedPermissions = [
/*SV*/
'user_add',
'user_edit',
'user_delete',
'user_view'];
$regexrule = '/';
foreach (self::$allowedPermissions as $allowedPermission) {
$regexrule .= '\b'.$allowedPermission.'\b';
if(end(self::$allowedPermissions) !== $allowedPermission) $regexrule .='|';
}
$regexrule .= "/";
return 'regex:'.$regexrule;
It is adding backslashes where I don't expect them:
regex:\/\\buser_add\\b|\\buser_edit\\b|\\buser_delete\\b|\\buser_view\\b|\\bpatient_add\\b|\\bpatient_edit\\b|\\bpatient_delete\\b|\\bpatient_view\\b|\\bmake_per\\b|\\bmake_per_withconfirmation\\b|\\bconfirm_per\\b|\\beval_per\\b|\\beval_per_withconfirmation\\b|\\bconfirm_per_report\\b\/
Backup screenshot of regex
Is there a workaround?
I found out that returning it in json format was adding the backslashes.
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I have this string
RRULE:FREQ=WEEKLY;COUNT=13;BYDAY=MO,SU
Now the part BYDAY=MO,SU can be in any position like
RRULE:FREQ=WEEKLY;BYDAY=WE,TH;INTERVAL=2;COUNT=5; -> BYDAY=WE
I just want to replace the value of BYDAY=value
let's say I have updated value of BYDAY=FR
I've tried to use str_replace() but the given value of of BYDAY can be anything like MO,TU,WE,TH
Using preg_replace, we can try:
$input = "RRULE:FREQ=WEEKLY;COUNT=13;BYDAY=MO,SU";
$output = preg_replace("/\bBYDAY=[^;]+/", "BYDAY=FR", $input);
echo $input . "\n" . $output;
This prints:
RRULE:FREQ=WEEKLY;COUNT=13;BYDAY=MO,SU
RRULE:FREQ=WEEKLY;COUNT=13;BYDAY=FR
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I have regexes stored in a txt file. How do I escape them in PHP? preg_quote doesn't help if I use the output in an array, throws fatal error. (The following each are on new lines in the txt file)
/[^a-z\/'"]eval\([^\)]+['"\s\);]+/i
/\$auth_pass\s*=.+;/i
/document\.write\((['"])<iframe .+<\/iframe>\1\);*/i
/preg_replace\s*\(.+[\/\#\|][i]*e[i]*['"].+\)/i
/<\?.+?exec\(.+?system\(.+?passthru\(.+fwrite\(.+/s
/RewriteRule [^ ]+ http\:\/\/(?!127\.).*/i
/<\?[\shp]*\#?error_reporting\(0\);.+?[a-z0-9\/\-\='"\.]{2000}.*?($|\?>)/i
/\<a [^\>]+\>\<span style="color\:\#F1EFE4;"\>(.+?)\<\/span\>\<\/a\>\<span style="color\:\#F1EFE4;"\>(.+?)\<\/span\>/i
/(<!\d)\$[\$\{]*[a-z\-\_0-9]+[\} \t]*(\[[^\]]+\][ \t]*)*\(.*?\)\;/i
/\#(\w+)\#.+?\#\/\1\#/is
/(\$[a-z_0-9]+[=\s\#]+)?create_function\([^,]+,[\s\$\.\[\]a-z_0-9]+[\s\)]+;*/i
/json2\.min\.js/i
/(RewriteCond \%\{HTTP_USER_AGENT\} .+\s+)+RewriteRule \^.*\$ http:\/\/(?!127\.).*/i
/<title>[^<]*hack[3e][rd]/i
I think you need to adjust your call to preg_quote(). Something like this:
Preg_match("|" . preg_quote($str, "|") . "|", $content->content)
See another post with a similar question:
PHP String to Regex
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How can I create a crawler in php which search for a particular string in a webpage and returns whether it is present or not?
Try this function I made, it takes in the pages URL and the string to look for in this URL's content.
<?php
var_dump(searchPage("http://google.com", "Tacos")); //False
var_dump(searchPage("http://google.com", "Google")); //True
function searchPage($url, $string){
$input = file_get_contents($url);
if (strpos($input,$string) !== false) {
return true;
}else{
return false;
}
}
?>
I hope this helped,
Sebastian
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In PHP, i have strings , similar:
"www.mysite.com/fa/doc/report/67571/مطذح کردنو تت";
"www.mysite.com/fa/571/نهتال اهخع";
"www.mysite.com/fa/";
I want if there are Persian's Chars of string, delete them.
Output:
www.mysite.com/fa/doc/report/67571/
www.mysite.com/fa/571/
www.mysite.com/fa/
How can i do this?
You should try this code.
<?php
echo remove_persian("www.mysite.com/fa/doc/report/67571/مطذح کردنو تت");
function remove_persian($text)
{
return preg_replace('#[^a-zA-Z0-9./]#', '', $text);
}
This will output like this:
www.mysite.com/fa/doc/report/67571/
You can use a regex :
$clean = preg_replace('[^a-zA-Z\/\d\s:]', '', $url);
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I attempted encoding a '=' symbol to its html equivalent through the use of:
htmlentities("This is my test and it = this");
The result is:
<p>This is my test and it = this</p>1
Notice how the equals sign is not encoded? I know there is a HTML equivalent.
What is an alternative function I can use to encode this string?
Thanks.
I know there is a HTML equivalent
The equals sign isn't encoded for HTML, there is no reason to do so.
You might be thinking of URL-encoding, which would be %3d:
urlencode("This is my test and it = this");
// => "This+is+my+test+and+it+%3D+this"
There's no need to encode the =; it's HTML-safe. If you really want to, though: =
echo str_replace('=', '=', htmlentities("This is my test and it = this"));
Demo