Regex Tester

Dan's Tools

Library

Regex Tester is a tool to learn, build, & test Regular Expressions (RegEx / RegExp).

Results update in real-time as you type.
Roll over a match or expression for details.
Save & share expressions with others.
Explore the Library for help & examples.
Undo & Redo with {{getCtrlKey()}}-Z / Y.
Search for & rate Community patterns.

Character classes
.	any character except newline
\w \d \s	word, digit, whitespace
\W \D \S	not word, digit, whitespace
[abc]	any of a, b, or c
[^abc]	not a, b, or c
[a-g]	character between a & g
Anchors
^abc$	start / end of the string
\b	word boundary
Escaped characters
\. \* \\	escaped special characters
\t \n \r	tab, linefeed, carriage return
\u00A9	unicode escaped ©
Groups & Lookaround
(abc)	capture group
\1	backreference to group #1
(?:abc)	non-capturing group
(?=abc)	positive lookahead
(?!abc)	negative lookahead
Quantifiers & Alternation
a* a+ a?	0 or more, 1 or more, 0 or 1
a{5} a{2,}	exactly five, two or more
a{1,3}	between one & three
a+? a{2,}?	match as few as possible
ab\|cd	match ab or cd

<!DOCTYPE html>
<html lang="en">
<head>
<title>RegexPlanet: online regular expression testing for Ruby</title>
<meta name="description" content="Online regular expression testing for Ruby using Regexp class" />
<meta name="keywords" content="regex, regexp, regular expression, Ruby, Regexp class" />
<meta content="width=device-width, initial-scale=1.0" name="viewport">
<link rel="shortcut icon" type="image/x-icon" href="/favicon.ico"/>
<link rel="stylesheet" type="text/css" href="//maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css" />
<link rel="stylesheet" type="text/css" href="//maxcdn.bootstrapcdn.com/font-awesome/4.1.0/css/font-awesome.min.css" />
<link rel="stylesheet" type="text/css" href="/css/override.css" />
<script src="http://code.jquery.com/jquery-2.1.1.js"></script>
<script src="//maxcdn.bootstrapcdn.com/bootstrap/3.2.0/js/bootstrap.min.js"></script>
<script type="text/javascript">
var _gaq = _gaq || [];
_gaq.push(['_setAccount', 'UA-328425-6']);
_gaq.push(['_trackPageview']);
(function() {
var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
})();
</script>

function doshare()
	{
		$("sharemessage").html("<b>Saving, please wait...</b>");
		_gaq.push(['_trackEvent', 'api-ruby', 'share' ]);

$("#cbaction").val('share');
		$.ajax({
			data: $("#testform").serialize(),
			dataType: "jsonp",
			success: function(data)
				{
					if (data.success)
					{
						$("#sharemessage").empty();
						$("#sharemessage").append($("<span>").attr("class", "alert alert-info").append("Your sharing link is ").append($("<a>").attr("href", data.url).text(data.url)));
					}
					else
					{
						$("#sharemessage").empty();
						$("#sharemessage").append($("<span>").attr("class", "alert alert-danger").text(data.message));
					}
				},
			timeout: 30000,
			type: "POST",
			url: "/cookbook/save.json",
		});
	}

function dotargetedit(e)
	{
		var targetEl = $("input[name=target]", $(e.target).closest("div"));

console.log(targetEl);//.val());

$("#targetEditorText").val(targetEl.val());

$('#targetEditor').modal();

$("#targetEditorSave").off("click");
		$("#targetEditorSave").click( function() { targetEl.val($("#targetEditorText").val()); $('#targetEditor').modal('hide'); } );
	}

function dotest()
	{
		$("#flashmessage").hide();
		$("#resulttitle").show();
		$("#resultbody").html("<b>Please wait...</b>").show();

_gaq.push(['_trackEvent', 'api-ruby', 'test' ]);

var data = $("#testform").serialize();

if (false) 		// override with "?proxy=y". not needed due to CORS (data.length > 1024), except MSIE doesn't seem to work.  why?
		{
			$.ajax({
				data: data,
				dataType: "json",
				error: showTestError,
				success: showTestSuccess,
				timeout: 30000,
				type: "POST",
				url: "proxy.json",
			});
		}
		else
		{
			$.ajax({
				data: data,
				dataType: "json",
				error: showTestError,
				success: showTestSuccess,
				timeout: 30000,
				type: "POST",
				url: "http://regexplanet-ruby.herokuapp.com/test.json",
			});
		}
	}

function initCookbook()
	{
		var key = $('[name="key"]').val();
		if (key && key.length > 0)
		{
			$("#cbadd").hide();
			$("#cbfork").show();
			$("#cbsave").show();
			$("#cbview").show();
		}
		else
		{
			$("#cbadd").show();
			$("#cbfork").hide();
			$("#cbsave").hide();
			$("#cbview").hide();
		}

var edit = $('[name="edit"]').val();
		if (edit && edit == "Y")
		{
			$("#cbsave").removeClass("disabled");
		}
		else
		{
			$("#cbsave").addClass("disabled");
		}
	}

function showTestError(xhr, msg, ex)
	{
		$("#resultbody").empty();
		$("#resultbody").append($("<div>").attr("class", "alert alert-danger").text("ERROR: " + msg + " (" + ex + ")"));
		$(document).scrollTop($("#resulttitle").offset());
		_gaq.push(['_trackEvent', 'api-ruby', 'error', msg + " (" + ex + ") for '" + $("#regex").val() + "'" ]);
	}

function switchEngine(event)
	{
		$("#testform").attr('action', event.currentTarget.href);
		$("#testform").unbind('submit');
		$("#testform").submit();
		return false;
	}

$(document).ready(function() {
		$("#regex").focus();

$(".helptip").popover();

$(".moreinput").click(function()
			{
				var inputs = $('textarea[name="input"]');

var target = null;

for (var loop = 0; loop < 5; loop++)
				{
					var index = (inputs.length + 1 + loop);
					var input = $("<textarea>").attr("class", "input-xxlarge").attr("id", "input" + index).attr("name", "input").attr("rows", "1");
							//.append($("<textarea>").attr("class", "xxlarge").attr("name", "input").attr("rows", "1"))

if (target == null)
					{
						target = input;
					}
					var row = $("<div>").attr("class", "control-group")
					.append($("<label>").attr("class", "control-label").attr("for", "input" + index).text("Input {0}:".replace("{0}", index)))
						.append($("<div>").attr("class", "controls")
							.append(input)
							);

row.insertBefore("#buttondiv");
				}
				target.focus();

return false;
			});

$(".targetedit").click(dotargetedit);

initCookbook();
		$("#testform").submit( function() { dotest(); return false; } );
		$("#cbadd").click( function() { dosave('add'); return false; } );
		$("#cbfork").click( function() { dosave('fork'); return false; } );
		$("#cbsave").click( function() { dosave('save'); return false; } );
		$("#cbview").click( function() { window.location = '/cookbook/' + $('[name="key"]').val() + '/index.html'; return false; } );
		$("#makeshare").click( function() { doshare(); return false; } );
		$(".advancedlink").click(switchEngine);
		
	});
</script>
</head>
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				<a class="btn btn-default" href="http://www.ruby-doc.org/core-1.9.3/Regexp.html" target="_blank">Regexp Ruby-Doc</a>

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			<h1>Regular Expression Test Page <small>for Ruby</small></h1>
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			};
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</div>
		<div id="flashmessage" class="alert alert-warning">
Online testing with the Ruby engine is still in beta.</div>

<div class="section-header" id="resulttitle" style="display:none;">
		  <h2>Test Results</h2>
		</div>

<form action="index.html" class="form-horizontal" id="testform" method="POST" name="testform">
<input type="hidden" name="key" value="" />
<input type="hidden" name="edit" value="N" />
<input type="hidden" name="engine" value="ruby" />
	<legend>Expression to test</legend>

<div class="form-group">
		<label class="col-sm-3 control-label" for="regex">Regular expression:</label>
		<div class="col-sm-9">
			<textarea id="regex" class="form-control" type="text" rows="1" name="regex">

Options:

Ignore whitespace in the regular expression (EXTENDED)

Case insensitive matching (IGNORECASE)

Newlines are just another character (MULTILINE)

Replacement:

Input 1:

Input 2:

Input 3:

Input 4:

Input 5:

catch class name list

as title

Comments

Posting GuidelinesFormatting

Top Regular Expressions

Url checker with or without http:// or https://
Match string not containing string
Check if a string only contains numbers
Only letters and numbers
Match elements of a url
Url Validation Regex | Regular Expression - Taha
Match an email address
Validate an ip address
nginx test
match whole word
Match or Validate phone number
Match html tag
Find Substring within a string that begins and ends with paranthesis
Blocking site with unblocked games
Match dates (M/D/YY, M/D/YYY, MM/DD/YY, MM/DD/YYYY)
Empty String
Match if doesn't start with string
Checks the length of number and not starts with 0
all except word
Match a valid hostname

Cheat Sheet

Character classes
.	any character except newline
\w \d \s	word, digit, whitespace
\W \D \S	not word, digit, whitespace
[abc]	any of a, b, or c
[^abc]	not a, b, or c
[a-g]	character between a & g
Anchors
^abc$	start / end of the string
\b	word boundary
Escaped characters
\. \* \\	escaped special characters
\t \n \r	tab, linefeed, carriage return
\u00A9	unicode escaped ©
Groups & Lookaround
(abc)	capture group
\1	backreference to group #1
(?:abc)	non-capturing group
(?=abc)	positive lookahead
(?!abc)	negative lookahead
Quantifiers & Alternation
a* a+ a?	0 or more, 1 or more, 0 or 1
a{5} a{2,}	exactly five, two or more
a{1,3}	between one & three
a+? a{2,}?	match as few as possible
ab\|cd	match ab or cd

Regex Tester

Substitution

Regular Expression

flags

Test String

Substitution

catch class name list

Comments

Top Regular Expressions

Cheat Sheet



Regex Tester



Regex Tester

Regex Tester

Substitution

Regular Expression JavascriptPCRE flags

Test String

Desired Result

Substitution

catch class name list

Comments

Top Regular Expressions

Cheat Sheet



Regex Tester



Regex Tester

Regular Expression

flags