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Validating IPv4 addresses with regexp
...ase you are curious what was wrong with your original approach, the answer is that you need parentheses around your alternation otherwise the (\.|$) is only required if the number is less than 200.
'\b((25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)(\.|$)){4}\b'
^ ^
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How to pop an alert message box using PHP?
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You could use Javascript:
// This is in the PHP file and sends a Javascript alert to the client
$message = "wrong answer";
echo "<script type='text/javascript'>alert('$message');</script>";
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MISCONF Redis is configured to save RDB snapshots
During writes to Redis ( SET foo bar ) I am getting the following error:
31 Answers
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How can I get zoom functionality for images?
Is there a common way to show a big image and enable the user to zoom in and out and pan the image?
13 Answers
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Should I use single or double colon notation for pseudo-elements?
... the whole rule:
When a user agent cannot parse the selector (i.e., it is not valid CSS 2.1), it must ignore the selector and the following declaration block (if any) as well.
CSS 2.1 gives a special meaning to the comma (,) in selectors. However, since it is not known if the comma may acqu...
Difference between Grunt, NPM and Bower ( package.json vs bower.json )
... bit of experience with rails, so I'm familiar with the idea of files for listing dependencies (such as bundler Gemfile)
2 ...
Google maps API V3 - multiple markers on exact same spot
Bit stuck on this one. I am retrieving a list of geo coords via JSON and popping them onto a google map. All is working well except in the instance when I have two or more markers on the exact same spot. The API only displays 1 marker - the top one. This is fair enough I suppose but would like t...
PHP + MySQL transactions examples
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The idea I generally use when working with transactions looks like this (semi-pseudo-code):
try {
// First of all, let's begin a transaction
$db->beginTransaction();
// A set of queries; if one fails, an exception should be thrown
$db->query('first query');
$db-&...
Why can't we autowire static fields in spring?
... we autowire the static instance variable in the Spring bean. I know there is another way to achieve this but just want to know why cant we do it in below way.
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What is an abstract class in PHP?
What is an abstract class in PHP?
7 Answers
7
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