Linux – chown directory for multiple users

Create a new group for users (run commands with root rights): groupadd testgroup gpasswd -a user1 testgroup gpasswd -a user2 testgroup gpasswd -a user3 testgroup … Make that group the group owner of the directory (with root rights): chown -R user1:testgroup /your/directory Make the group writeable (with root rights): chmod -R g+w /your/directory

Regular expression for IP address

Regular expression for IP address: Regex for IPv4 /^((2[0-4]|1\d|[1-9])?\d|25[0-5])(\.(?1)){3}\z/ Regex for IPv6 /^(((?=(?>.*?(::))(?!.+\3)))\3?|([\dA-F]{1,4}(\3|:(?!$)|$)|\2))(?4){5}((?4){2}|((2[0-4]|1\d|[1-9])?\d|25[0-5])(\.(?7)){3})\z/i

Regex to match email addresses

The “official” fool-proof regex to match email addresses known as RFC 5322: (?:[a-z0-9!#$%&’*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&’*+/=?^_`{|}~-]+)* | “(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21\x23-\x5b\x5d-\x7f] | \\[\x01-\x09\x0b\x0c\x0e-\x7f])*”) @ (?:(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])? | \[(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3} (?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?|[a-z0-9-]*[a-z0-9]: (?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21-\x5a\x53-\x7f] | \\[\x01-\x09\x0b\x0c\x0e-\x7f])+) \]) A more practical implementation of RFC 5322 if we omit the syntax using double quotes and square brackets. It will still match 99.99% of all email addresses in actual

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Javascript simple clock

Create a simple function that get the client time (hours:minutes:seconds) and prints it in the div: <script type=”text/javascript”> function getTime() { var currentDate = new Date(); var hour = currentDate.getHours(); var min = currentDate.getMinutes(); var sec = currentDate.getSeconds(); var currentTime = hour + “:” + min + “:” + sec; document.getElementById(‘clock’).innerHTML = currentTime; } setInterval(“getTime()”,

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Add a custom right-click function to a web application

Add a custom right-click function to a web application. Also can be used to implemen a custom menu opened on right-click: <script language=”javascript” type=”text/javascript”> document.oncontextmenu = RightMouseDown; document.onmousedown = mouseDown; function mouseDown(e) { if (e.which == 3) {//righClick console.log(“Right-click goes here”); } } function RightMouseDown() { console.log(“Right-click Context goes here”); return false; } </script>

Regular Expression for html paragraph

The expression bellow can be used to extract paragraphs information from a html document. This expression can be changed to be applied to other HTML tags. preg_match(‘/(]*>.*?)/i’, $subject, $matches);

Get duplicate id’s in DOM using jQuery

Get duplicate id’s in DOM using jQuery // Warning Duplicate IDs $(‘[id]’).each(function(){ var ids = $(‘[id=”‘+this.id+'”]’); if(ids.length > 1 && ids[0] == this) console.warn(‘Multiple IDs #’+this.id); });

Zend Framework 1 – trace and log sql errors and exceptions

Zend Framework 1 – trace sql errors and exceptions and put them in a log file. Add the next code in the ErrorController.php: <?php class ErrorController extends Zend_Controller_Action { … public function errorAction() { … if (get_class($errors->exception) == ‘Zend_Db_Statement_Exception’) { $writer = new Zend_Log_Writer_Stream(“ADD HERE YOUR LOG PATH”); $logger = new Zend_Log($writer); $logger->info($errors->exception); } …

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Create a new rule for jquery.validator plugin

Create a new simple rule for jquery.validator plugin by doing something like this: jQuery.validator.addMethod(“greaterThanZero”, function(value, element) { return this.optional(element) || (parseFloat(value) > 0); }, “* Amount must be greater than zero”); Apply the new rule: $(‘validatorElement’).validate({ rules : { amount : { greaterThanZero : true } } });

Javascript strip tags

A very useful snippet code to strip html tags using Javascript: var strippedString = string.replace(/(]+)>)/ig,””); Read entire article and commentshere