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isset() and empty() - what to use
... $var; (a variable declared, but without a value in a class)
From http://php.net/manual/en/function.empty.php
As mentioned in the comments the lack of warning is also important with empty()
PHP Manual says
empty() is the opposite of (boolean) var, except that no warning is
generated when...
How do I compare version numbers in Python?
...3.a4"), version.Version)
True
>>> isinstance(version.parse("1.3.xy123"), version.LegacyVersion)
True
>>> version.Version("1.3.xy123")
Traceback (most recent call last):
...
packaging.version.InvalidVersion: Invalid version: '1.3.xy123'
packaging.version.parse is a third-party uti...
How do you connect to multiple MySQL databases on a single webpage?
...a few databases and want to put all the information onto one webpage using PHP. I was wondering how I can connect to multiple databases on a single PHP webpage.
...
How do I deep copy a DateTime object?
...
I haven't tested it actually, but it is mentioned at php.net that this is only aviable for PHP 5.3 and greater.
– hugo der hungrige
Feb 1 '13 at 1:02
...
What is Common Gateway Interface (CGI)?
...onment variables.
In your case you most likely used another, specific for PHP, means of communication between your scripts and the webserver, this, as you well mention in your question, is an embedded interpreter called mod_php.
So, answering your questions:
What exactly is CGI?
See above.
...
How can I use PHP to dynamically publish an ical file to be read by Google Calendar?
Any Google search on PHP ical just brings up phpicalendar and how to parse or read IN ical files. I just want to write a PHP file that pulls events from my database and writes them out in ical format.
...
How to set my phpmyadmin user session to not time out so quickly? [duplicate]
...
To increase the phpMyAdmin Session Timeout, open config.inc.php in the root phpMyAdmin directory and add this setting (anywhere).
$cfg['LoginCookieValidity'] = <your_new_timeout>;
Where <your_new_timeout> is some number larger...
【解决】PHP Fatal error: require_once(): Failed opening required \'/u...
【解决】PHP Fatal error: require_once(): Failed opening required '/usr/share/php/php-gettext/gettext.inc'php缺失相关模块导致，解决方法很简单：apt-get install php-gettext重启apache2即可。php缺失相关模块导致，解决方法很简单：
apt-get install php-gettext
...
PHP - Check if two arrays are equal
... in different order, using $a == $b or $a === $b fails, for example:
<?php
(array("x","y") == array("y","x")) === false;
?>
That is because the above means:
array(0 => "x", 1 => "y") vs. array(0 => "y", 1 => "x").
To solve that issue, use:
<?php
function array_equal($a...
Best way to allow plugins for a PHP application
I am starting a new web application in PHP and this time around I want to create something that people can extend by using a plugin interface.
...