80,954 questions
2322
votes
36
answers
3.9m
views
RegEx match open tags except XHTML self-contained tags
I need to match all of these opening tags:
<p>
<a href="foo">
But not self-closing tags:
<br />
<hr class="foo" />
I came up with this and wanted to make ...
573
votes
30
answers
554k
views
PHP mail function doesn't complete sending of e-mail
<?php
$name = $_POST['name'];
$email = $_POST['email'];
$message = $_POST['message'];
$from = 'From: yoursite.com';
$to = '[email protected]';
$subject = 'Customer ...
- 5,773
2323
votes
32
answers
481k
views
How do you parse and process HTML/XML in PHP?
How can one parse HTML/XML and extract information from it?
1296
votes
41
answers
512k
views
How to remove the space between inline/inline-block elements?
There will be a 4 pixel wide space between these span elements:
span {
display: inline-block;
width: 100px;
background-color: palevioletred;
}
<p>
<span> Foo </span>
&...
- 186k
5102
votes
128
answers
5.0m
views
How can I horizontally center an element?
How can I horizontally center a <div> within another <div> using CSS?
<div id="outer">
<div id="inner">Foo foo</div>
</div>
995
votes
14
answers
1.8m
views
Flexbox: center horizontally and vertically
How to center div horizontally, and vertically within the container using flexbox. In below example, I want each number below each other (in rows), which are centered horizontally.
.flex-container ...
- 58.8k
590
votes
7
answers
202k
views
Why don't flex items shrink past content size?
I have 4 flexbox columns and everything works fine, but when I add some text to a column and set it to a big font size, it is making the column wider than it should be due to the flex property.
I ...
- 6,009
260
votes
4
answers
94k
views
CSS-only masonry layout
I need to implement a masonry layout. However, for a number of reasons I don't want to use JavaScript to do it.
Parameters:
All elements have the same width
Elements have a height that cannot be ...
- 450k
1685
votes
50
answers
1.9m
views
How can I vertically center a div element for all browsers using CSS?
I want to center a div vertically with CSS. I don't want tables or JavaScript, but only pure CSS. I found some solutions, but all of them are missing Internet Explorer 6 support.
<body>
<...
- 20k
2310
votes
27
answers
567k
views
HTML: Valid id attribute values?
When creating the id attributes for HTML elements, what rules are there for the value?
- 26.5k
756
votes
10
answers
240k
views
Image inside div has extra space below the image
Why in the following code the height of the div is bigger than the height of the img ? There is a gap below the image, but it doesn't seems to be a padding/margin.
What is the gap or extra space ...
- 172k
5470
votes
78
answers
4.9m
views
How can I validate an email address in JavaScript?
I'd like to check if the user input is an email address in JavaScript, before sending it to a server or attempting to send an email to it, to prevent the most basic mistyping. How could I achieve this?...
1092
votes
31
answers
2.1m
views
How can I vertically align elements in a div?
I have a div with two images and an h1. All of them need to be vertically aligned within the div, next to each other. One of the images needs to be absolute positioned within the div.
What is the CSS ...
- 16.6k
1249
votes
31
answers
2.7m
views
How can I center text (horizontally and vertically) inside a div block?
I have a div set to display:block (90px height and width), and I have some text inside.
I need the text to be aligned in the center both vertically and horizontally.
I have tried text-align:center, ...
- 49.5k
1089
votes
10
answers
717k
views
What is a clearfix?
Recently I was looking through some website's code, and saw that every <div> had a class clearfix.
After a quick Google search, I learned that it is for IE6 sometimes, but what actually is a ...
- 22.8k