regex to match substring exist in javascript

Question

I want to write a regex to match whether my url has gmt.php or not. For example:

If my url is http://example.com/gmt.php?a=1 it is true

If my url is http://example.com/ac.php then it is false

I tried:

/^([a-z0-9])$/.test('gmt.php');

but its not perfect. And yes I need only regex not substring match indexOf Thanks.

"but its not perfect" - or in any way related to what you're trying to do... May I suggest that you google up a regex tutorial, and you'll find this is very easy to implement. — nnnnnn
– nnnnnn, Commented Mar 11, 2016 at 6:36

gurvinder372 · Accepted Answer · 2016-03-11 06:42:28Z

1

Why not simply indexOf

url.indexOf( "gmt.php" ) != -1 //outputs true if it exists

For regex (not sure why you want regex for such simple thing ;))

/gmt\.php/.test('http://example.com/gmt.php?a=1 ');

or

/gmt.php/.test('http://example.com/gmt.php?a=1 ');//since . is . outside []

/^([a-z0-9])$/.test('gmt.php');

but its not perfect.

Because /^([a-z0-9])$/ will only match one alpha-numeric character.

edited Mar 11, 2016 at 6:42

answered Mar 11, 2016 at 6:35

gurvinder372

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4 Comments

Bhuvnesh Gupta Over a year ago

it is not regex, I need regex. :)

Bhuvnesh Gupta Over a year ago

Thanks but I need it because some regex was already written for it and I have to use in that flow :)

gurvinder372 Over a year ago

@BhuvneshGupta did you tried the regex I have shared?

Bhuvnesh Gupta Over a year ago

This is working fine but I need some more correction. It should match if there is anything before or after gmt.php e.g if it is abgmt.phpa then it should also return true.

Tibrogargan · Accepted Answer · 2016-03-11 06:39:04Z

0

Try this instead: /gmt.php/.test(url)

<html>
<head><title>foo</title>
<script>
function foo(url) {
  alert(/gmt.php/.test(url));
}
</script>
</head>
<body>
<form>
<input type="text" id="text" size="40"><input type="button" onclick="foo(document.getElementById('text').value)">
</form>
</body>

answered Mar 11, 2016 at 6:39

Tibrogargan

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Comments

wwwy · Accepted Answer · 2016-03-11 06:43:18Z

0

var reg = /^(?:https?:\/\/\w+\.\w+\/)?\w+\.\w+\?\w+\=\w+$/;
var url1 = 'http://example.com/gmt.php?a=1';
var url2 = 'http://example.com/ac.php';
var url3 = 'gmt.php?a=1';
var url4 = 'gmt.php'
    console.log(reg.test(url1));
    console.log(reg.test(url2));
    console.log(reg.test(url3));
    console.log(reg.test(url4));

if have other fail data,please @me,

answered Mar 11, 2016 at 6:43

wwwy

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