$content = preg_replace("/<img[^>]+\>/i", "", $content);

php

1

Regex remove img tag

$content = preg_replace("/<img[^>]+\>/i", "", $content);

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• img, 
• regex, 
• remove, 
• strip, 
• tag

#!/usr/bin/perl 
while (<STDIN>) {
s/<[a-zA-Z\/][^>]*>//g;
print $_;
}

perl

1

Perl remove html tags

#!/usr/bin/perl 
while (<STDIN>) {
s/<[a-zA-Z\/][^>]*>//g;
print $_;
}

copy | embed

• regex

<?php

$pattern = "@\b(https?://)?(([0-9a-zA-Z_!~*'().&=+$%-]+:)?[0-9a-zA-Z_!~*'().&=+$%-]+\@)?(([0-9]{1,3}\.){3}[0-9]{1,3}|([0-9a-zA-Z_!~*'()-]+\.)*([0-9a-zA-Z][0-9a-zA-Z-]{0,61})?[0-9a-zA-Z]\.[a-zA-Z]{2,6})(:[0-9]{1,4})?((/[0-9a-zA-Z_!~*'().;?:\@&=+$,%#-]+)*/?)@";

$text = preg_replace($pattern, '<a target="_blank" rel="nofollow" href="\0">\0</a>', $text);

return $text;

php

1

Regular expression in PHP to convert URLs to HTML links

<?php

$pattern = "@\b(https?://)?(([0-9a-zA-Z_!~*'().&=+$%-]+:)?[0-9a-zA-Z_!~*'().&=+$%-]+\@)?(([0-9]{1,3}\.){3}[0-9]{1,3}|([0-9a-zA-Z_!~*'()-]+\.)*([0-9a-zA-Z][0-9a-zA-Z-]{0,61})?[0-9a-zA-Z]\.[a-zA-Z]{2,6})(:[0-9]{1,4})?((/[0-9a-zA-Z_!~*'().;?:\@&=+$,%#-]+)*/?)@";

$text = preg_replace($pattern, '<a target="_blank" rel="nofollow" href="\0">\0</a>', $text);

return $text;

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• links, 
• php, 
• regex, 
• urls

function extractNumber(str) {
	str = str.match(/\d+/g);
	return str.join('');
}

$(function() {

	// Sets a ele based on a number of values in the format like '    $15.50/Month'

	var total = 0;                                                                                                                                                                                                
	$('p').not('#total').each(function() {
		total += parseInt( extractNumber( $.trim( $(this).text() ) ) );
	});
	total = '$' + Math.round(total)/100;// make price to 2 decimal places 
	
	$('#total').text(total);

});

js

1

Integer from String (dollar formatted)

function extractNumber(str) {
	str = str.match(/\d+/g);
	return str.join('');
}

$(function() {

	// Sets a ele based on a number of values in the format like '    $15.50/Month'

	var total = 0;                                                                                                                                                                                                
	$('p').not('#total').each(function() {
		total += parseInt( extractNumber( $.trim( $(this).text() ) ) );
	});
	total = '$' + Math.round(total)/100;// make price to 2 decimal places 
	
	$('#total').text(total);

});

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• currency, 
• dollar, 
• integer, 
• jquery, 
• money, 
• number, 
• regex, 
• string

/^([\w\!\#$\%\&\'\*\+\-\/\=\?\^\`{\|\}\~]+\.)*[\w\!\#$\%\&\'\*\+\-\/\=\?\^\`{\|\}\~]+@((((([a-z0-9]{1}[a-z0-9\-]{0,62}[a-z0-9]{1})|[a-z])\.)+[a-z]{2,6})|(\d{1,3}\.){3}\d{1,3}(\:\d{1,5})?)$/i

raw

1

Email validation for preg_match()

/^([\w\!\#$\%\&\'\*\+\-\/\=\?\^\`{\|\}\~]+\.)*[\w\!\#$\%\&\'\*\+\-\/\=\?\^\`{\|\}\~]+@((((([a-z0-9]{1}[a-z0-9\-]{0,62}[a-z0-9]{1})|[a-z])\.)+[a-z]{2,6})|(\d{1,3}\.){3}\d{1,3}(\:\d{1,5})?)$/i

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• email, 
• regex, 
• validation

<?php
$email = "someone@example.com";

if(eregi("^[_a-z0-9-]+(\.[_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]{2,3})$", $email)) {
  echo "Valid email address.";
}
else {
  echo "Invalid email address.";
}
?>

php

1

PHP email regex check

<?php
$email = "someone@example.com";

if(eregi("^[_a-z0-9-]+(\.[_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]{2,3})$", $email)) {
  echo "Valid email address.";
}
else {
  echo "Invalid email address.";
}
?>

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• email, 
• regex

/^([\w\!\#$\%\&\'\*\+\-\/\=\?\^\`{\|\}\~]+\.)*[\w\!\#$\%\&\'\*\+\-\/\=\?\^\`{\|\}\~]+@((((([a-z0-9]{1}[a-z0-9\-]{0,62}[a-z0-9]{1})|[a-z])\.)+[a-z]{2,6})|(\d{1,3}\.){3}\d{1,3}(\:\d{1,5})?)$/i

php

1

Email validation using preg_match (via James Watts and Francisco Jose Martin Moreno)

/^([\w\!\#$\%\&\'\*\+\-\/\=\?\^\`{\|\}\~]+\.)*[\w\!\#$\%\&\'\*\+\-\/\=\?\^\`{\|\}\~]+@((((([a-z0-9]{1}[a-z0-9\-]{0,62}[a-z0-9]{1})|[a-z])\.)+[a-z]{2,6})|(\d{1,3}\.){3}\d{1,3}(\:\d{1,5})?)$/i

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• preg_match, 
• regex

#Original regex
to_date\('[0-9]{2}-[0-9]{2}-[0-9]{4}\s{1}[0-9]{2}:[0-9]{2}:[0-9]{2}',\s{1}'dd-mm-yyyy\s{1}hh24:mi:ss'\)
to_date\('[0-9]{2}-[A-Z]{3}-[0-9]{2}','DD-MON-RR'\)

# For notepad++
to_date\('[0-9]+-[0-9]+-[0-9]+\s[0-9]+:[0-9]+:[0-9]+',\s'dd-mm-yyyy\shh24:mi:ss'\)
to_date\('[0-9]+-[A-Z]+-[0-9]+','DD-MON-RR'\)

perl

1

get to_date regex for notepad++

#Original regex
to_date\('[0-9]{2}-[0-9]{2}-[0-9]{4}\s{1}[0-9]{2}:[0-9]{2}:[0-9]{2}',\s{1}'dd-mm-yyyy\s{1}hh24:mi:ss'\)
to_date\('[0-9]{2}-[A-Z]{3}-[0-9]{2}','DD-MON-RR'\)

# For notepad++
to_date\('[0-9]+-[0-9]+-[0-9]+\s[0-9]+:[0-9]+:[0-9]+',\s'dd-mm-yyyy\shh24:mi:ss'\)
to_date\('[0-9]+-[A-Z]+-[0-9]+','DD-MON-RR'\)

copy | embed

• notepad++, 
• regex

var pattern:RegExp = (\w+@[a-zA-Z_]+?\.[a-zA-Z]{2,6});

// PHP return preg_match('/^[A-Za-z0-9\._\-+]+@[A-Za-z0-9_\-+]+(\.[A-Za-z0-9_\-+]+)+$/', $value);

as3

1

Email RegExp

var pattern:RegExp = (\w+@[a-zA-Z_]+?\.[a-zA-Z]{2,6});

// PHP return preg_match('/^[A-Za-z0-9\._\-+]+@[A-Za-z0-9_\-+]+(\.[A-Za-z0-9_\-+]+)+$/', $value);

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• as3, 
• email, 
• flash, 
• regex

var pattern:RegExp = ([^\s]+(?=\.(jpg|gif|png))\.\2);

as3

1

Is GIF, JPG, PNG

var pattern:RegExp = ([^\s]+(?=\.(jpg|gif|png))\.\2);

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• as3, 
• flash, 
• images, 
• regex

var str:String = "Hello World!";

var myPattern:RegExp = /Hello/g; //regex to remove all hellos
str = str.replace(myPattern, "Goodbye");
trace(str); // Goodbye World!

as3

1

RegEx - Find and Replace

var str:String = "Hello World!";

var myPattern:RegExp = /Hello/g; //regex to remove all hellos
str = str.replace(myPattern, "Goodbye");
trace(str); // Goodbye World!

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• as3, 
• find, 
• flash, 
• regex, 
• replace, 
• string

// Validate URL
/^(https?:\/\/)?([\da-z\.-]+)\.([a-z\.]{2,6})([\/\w \?=.-]*)*\/?$/

// Unclosed image tags
<img([^>]+)(\s*[^\/])>

js

1

Some useful regex...

// Validate URL
/^(https?:\/\/)?([\da-z\.-]+)\.([a-z\.]{2,6})([\/\w \?=.-]*)*\/?$/

// Unclosed image tags
<img([^>]+)(\s*[^\/])>

copy | embed

• regex, 
• util

$(function(){
 
var email = $("input#email").val();
	if(isValidEmailAddress(email)) {
		$(email).after("hooray!");
	} else {
		$(email).addClass("yourerror").after("<label class='error'>Email is not valid!</label>").focus();
		return false;
	}
});
 
function isValidEmailAddress(emailAddress) {
var pattern = new RegExp(/^(("[\w-\s]+")|([\w-]+(?:\.[\w-]+)*)|("[\w-\s]+")([\w-]+(?:\.[\w-]+)*))(@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$)|(@\[?((25[0-5]\.|2[0-4][0-9]\.|1[0-9]{2}\.|[0-9]{1,2}\.))((25[0-5]|2[0-4][0-9]|1[0-9]{2}|[0-9]{1,2})\.){2}(25[0-5]|2[0-4][0-9]|1[0-9]{2}|[0-9]{1,2})\]?$)/i);
return pattern.test(emailAddress);
}

js

1

jQuery valid email regex

$(function(){
 
var email = $("input#email").val();
	if(isValidEmailAddress(email)) {
		$(email).after("hooray!");
	} else {
		$(email).addClass("yourerror").after("<label class='error'>Email is not valid!</label>").focus();
		return false;
	}
});
 
function isValidEmailAddress(emailAddress) {
var pattern = new RegExp(/^(("[\w-\s]+")|([\w-]+(?:\.[\w-]+)*)|("[\w-\s]+")([\w-]+(?:\.[\w-]+)*))(@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$)|(@\[?((25[0-5]\.|2[0-4][0-9]\.|1[0-9]{2}\.|[0-9]{1,2}\.))((25[0-5]|2[0-4][0-9]|1[0-9]{2}|[0-9]{1,2})\.){2}(25[0-5]|2[0-4][0-9]|1[0-9]{2}|[0-9]{1,2})\]?$)/i);
return pattern.test(emailAddress);
}

copy | embed

• check, 
• email, 
• jquery, 
• regex, 
• valid, 
• validation

//validate url
/^(https?:\/\/)?([\da-z\.-]+)\.([a-z\.]{2,6})([\/\w \?=.-]*)*\/?$/

//Validate US phone number
/^(\+\d)*\s*(\(\d{3}\)\s*)*\d{3}(-{0,1}|\s{0,1})\d{2}(-{0,1}|\s{0,1})\d{2}$/

//Test if a password is strong
(?=^.{8,}$)((?=.*\d)|(?=.*\W+))(?![.\n])(?=.*[A-Z])(?=.*[a-z]).*$

//Validate US zip code
^[0-9]{5}(-[0-9]{4})?$

//Validate Canadian postal code
^[ABCEGHJ-NPRSTVXY]{1}[0-9]{1}[ABCEGHJ-NPRSTV-Z]{1}[ ]?[0-9]{1}[ABCEGHJ-NPRSTV-Z]{1}[0-9]{1}$

//Grab unclosed img tags
<img([^>]+)(\s*[^\/])>

//Find all CSS attributes
\s(?[a-zA-Z-]+)\s[:]{1}\s*(?[a-zA-Z0-9\s.#]+)[;]{1}

//Get code within <?php and ?>
<\?[php]*([^\?>]*)\?>

php

1

Regular Expressions

//validate url
/^(https?:\/\/)?([\da-z\.-]+)\.([a-z\.]{2,6})([\/\w \?=.-]*)*\/?$/

//Validate US phone number
/^(\+\d)*\s*(\(\d{3}\)\s*)*\d{3}(-{0,1}|\s{0,1})\d{2}(-{0,1}|\s{0,1})\d{2}$/

//Test if a password is strong
(?=^.{8,}$)((?=.*\d)|(?=.*\W+))(?![.\n])(?=.*[A-Z])(?=.*[a-z]).*$

//Validate US zip code
^[0-9]{5}(-[0-9]{4})?$

//Validate Canadian postal code
^[ABCEGHJ-NPRSTVXY]{1}[0-9]{1}[ABCEGHJ-NPRSTV-Z]{1}[ ]?[0-9]{1}[ABCEGHJ-NPRSTV-Z]{1}[0-9]{1}$

//Grab unclosed img tags
<img([^>]+)(\s*[^\/])>

//Find all CSS attributes
\s(?[a-zA-Z-]+)\s[:]{1}\s*(?[a-zA-Z0-9\s.#]+)[;]{1}

//Get code within <?php and ?>
<\?[php]*([^\?>]*)\?>

copy | embed

• regex, 
• regular expression

<?php

$currDate = date('Y-m-d h:i:s');

// convert timestamp from mysql
$nextReviewDt = date('F d, Y',strtotime($nextReviewDt));

// Add 30 days 
$CommentStartDt = date('m/d/Y');
$CommentEndDt = date('m/d/Y', 
	mktime(0,0,0,date("m"),date("d")+30,date("Y"))); // add 30 days

// convert year to 4 digits
if ($y > 60) $y = '19'.$y;
else $y = '20'.$y;

// split if there are slash or dash
list($m, $d, $y) = split('[/|-]', $iDate);

if (preg_match("/-/", $iDate))
	list($m, $d, $y) = split('-', $iDate);
else if (preg_match("/\//", $iDate))
	list($m, $d, $y) = split('/', $iDate);

$specDate = mktime(0, 0, 0, $m, $d, $y);
$numOfDays = (time() - $specDate) / (24 * 60 * 60);

// convert date from mysql db
if (preg_match("/(.*)Dt$/", $dbDate))
	$dbDate = date("M d, Y h:ia", strtotime($dbDate));

// output dates - walk the days
$startDt = '2009-01-04';
$endDt = date('Y-m-d');
while ($startDt != $endDt)
{
	echo "$startDt <br/>";
	// increment the day
	$startDt = strtotime(date("Y-m-d", strtotime($startDt)) . " +1 day");
	// convert back to readable format
	$startDt = date("Y-m-d",$startDt);
}

function count_days( $a, $b )
{
	// First we need to break these dates into their constituent parts:
	$gd_a = getdate( $a );
	$gd_b = getdate( $b );

	// Now recreate these timestamps, based upon noon on each day
	// The specific time doesn't matter but it must be the same each day
	$a_new = mktime( 12, 0, 0, $gd_a['mon'], $gd_a['mday'], $gd_a['year'] );
	$b_new = mktime( 12, 0, 0, $gd_b['mon'], $gd_b['mday'], $gd_b['year'] );

	// Subtract these two numbers and divide by the number of seconds in a
	//  day. Round the result since crossing over a daylight savings time
	//  barrier will cause this time to be off by an hour or two.
	return round( abs( $a_new - $b_new ) / 86400 );
}

php

1

Dates Samples

<?php

$currDate = date('Y-m-d h:i:s');

// convert timestamp from mysql
$nextReviewDt = date('F d, Y',strtotime($nextReviewDt));

// Add 30 days 
$CommentStartDt = date('m/d/Y');
$CommentEndDt = date('m/d/Y', 
	mktime(0,0,0,date("m"),date("d")+30,date("Y"))); // add 30 days

// convert year to 4 digits
if ($y > 60) $y = '19'.$y;
else $y = '20'.$y;

// split if there are slash or dash
list($m, $d, $y) = split('[/|-]', $iDate);

if (preg_match("/-/", $iDate))
	list($m, $d, $y) = split('-', $iDate);
else if (preg_match("/\//", $iDate))
	list($m, $d, $y) = split('/', $iDate);

$specDate = mktime(0, 0, 0, $m, $d, $y);
$numOfDays = (time() - $specDate) / (24 * 60 * 60);

// convert date from mysql db
if (preg_match("/(.*)Dt$/", $dbDate))
	$dbDate = date("M d, Y h:ia", strtotime($dbDate));

// output dates - walk the days
$startDt = '2009-01-04';
$endDt = date('Y-m-d');
while ($startDt != $endDt)
{
	echo "$startDt <br/>";
	// increment the day
	$startDt = strtotime(date("Y-m-d", strtotime($startDt)) . " +1 day");
	// convert back to readable format
	$startDt = date("Y-m-d",$startDt);
}

function count_days( $a, $b )
{
	// First we need to break these dates into their constituent parts:
	$gd_a = getdate( $a );
	$gd_b = getdate( $b );

	// Now recreate these timestamps, based upon noon on each day
	// The specific time doesn't matter but it must be the same each day
	$a_new = mktime( 12, 0, 0, $gd_a['mon'], $gd_a['mday'], $gd_a['year'] );
	$b_new = mktime( 12, 0, 0, $gd_b['mon'], $gd_b['mday'], $gd_b['year'] );

	// Subtract these two numbers and divide by the number of seconds in a
	//  day. Round the result since crossing over a daylight savings time
	//  barrier will cause this time to be off by an hour or two.
	return round( abs( $a_new - $b_new ) / 86400 );
}

copy | embed

• date, 
• php, 
• regex

re.sub("<p>\s*?&nbsp;\s*?</p>", "REPLACEMENT", string)

python

1

Regex for static tag replacement.

re.sub("<p>\s*?&nbsp;\s*?</p>", "REPLACEMENT", string)

copy | embed

• python, 
• regex

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class RegexTester {

    /**
     * @param args
     */
    public static void main(String[] args) {
	// TODO Auto-generated method stub

	String regex = "/ajax/\\w+/(.*)";

	String[] strings = { "/ajax/hello/KID/de-mt.vc.ca02.06.04/1559286",
		"/ajax/hell_o/KID/de-mt.vc.ca02.06.04/1559286",
		"/ajax/h0e-l8l_o/KID/de-mt.vc.ca02.06.04/1559286", };

	for (String s : strings) {
	    Pattern pattern = Pattern.compile(regex);
	    Matcher matcher = pattern.matcher(s);

	    String kid = "";
	    if (matcher.find()) {
		// group(0) returns the entire match, not a captured group
		kid = matcher.group(1);
	    }

	    System.out.println(kid);
	}
    }
}

java

1

Java regex tester

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class RegexTester {

    /**
     * @param args
     */
    public static void main(String[] args) {
	// TODO Auto-generated method stub

	String regex = "/ajax/\\w+/(.*)";

	String[] strings = { "/ajax/hello/KID/de-mt.vc.ca02.06.04/1559286",
		"/ajax/hell_o/KID/de-mt.vc.ca02.06.04/1559286",
		"/ajax/h0e-l8l_o/KID/de-mt.vc.ca02.06.04/1559286", };

	for (String s : strings) {
	    Pattern pattern = Pattern.compile(regex);
	    Matcher matcher = pattern.matcher(s);

	    String kid = "";
	    if (matcher.find()) {
		// group(0) returns the entire match, not a captured group
		kid = matcher.group(1);
	    }

	    System.out.println(kid);
	}
    }
}

copy | embed

• java, 
• regex, 
• test

function replace_whitespace($Value = '')
{
	return preg_replace('/\s+/', ' ', trim($Value));
}

php

1

Replace any whitespace with only a single space

function replace_whitespace($Value = '')
{
	return preg_replace('/\s+/', ' ', trim($Value));
}

copy | embed

• php, 
• regex

# Use Double Brackets for Compound and Regex Tests
http://hacktux.com/bash/script/efficient

The [ or test builtins can be used to test expressions, but the [[ builtin operator additionally provides compound commands and regular expression matching.

if [[ expression1 || expression2 ]]; then do_something; fi
if [[ string =~ regex ]]; then do_something; fi 

text

1

use double brackets for compound and regex test

# Use Double Brackets for Compound and Regex Tests
http://hacktux.com/bash/script/efficient

The [ or test builtins can be used to test expressions, but the [[ builtin operator additionally provides compound commands and regular expression matching.

if [[ expression1 || expression2 ]]; then do_something; fi
if [[ string =~ regex ]]; then do_something; fi 

copy | embed

• and, 
• brackets, 
• compound, 
• double, 
• for, 
• regex, 
• test, 
• use

\b(([\w-]+://?|www[.])[^\s()<>]+(?:\([\w\d]+\)|([^[:punct:]\s]|/)))

text

1

URL Regex

\b(([\w-]+://?|www[.])[^\s()<>]+(?:\([\w\d]+\)|([^[:punct:]\s]|/)))

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• regex