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What's the difference between isset() and array_key_exists()? [duplicate]
...P function array_key_exists() determines if a particular key, or numerical index, exists for an element of an array. However, if you want to determine if a key exists and is associated with a value, the PHP language construct isset() can tell you that (and that the value is not null). array_key_exis...
How to change the session timeout in PHP?
...cted immediately but only whenever the session GC kicks in.
GC is a potentially expensive process, so typically the probability is rather small or even zero (a website getting huge numbers of hits will probably forgo probabilistic GC entirely and schedule it to happen in the background every X minut...
How to cancel a local git commit
...
You can tell Git what to do with your index (set of files that will become the next commit) and working directory when performing git reset by using one of the parameters:
--soft: Only commits will be reseted, while Index and the working directory are not altere...
SQL - Update multiple records in one query
... VALUES ";
$len = count($array);
foreach ($array as $index => $values) {
$sql .= '("';
$sql .= implode('", "', $array[$index]) . "\"";
$sql .= ')';
$sql .= ($index == $len - 1) ? "" : ", \n";
}
$sql .= "\nON DU...
Reference: What is variable scope, which variables are accessible from where and what are “undefined
... be in the global scope in a.php doesn't necessarily mean they are, it actually depends on which context that code is included/executed in.
What about functions inside functions and classes?
Every new function declaration introduces a new scope, it's that simple.
(anonymous) functions inside func...
convert_tz returns null
...ew tab to see Hidden files and Folders as explained here https://irch.info/index.php?pg=kb.page&id=133
4) Stop the MySQL service by searching for "services" in Windows Start button.
5) Then unzip the timezone_2017c_posix.zip and then copy the files in it (copy the files directly, don't copy th...
How do I expire a PHP session after 30 minutes?
...ms with filesystems where atime tracking is not available.
So it additionally might occur that a session data file is deleted while the session itself is still considered as valid because the session data was not updated recently.
And second:
session.cookie_lifetime
session.cookie_lifetime ...
Executing injected by innerHTML after AJAX call
...nd execute them by eval() function: $('#audit-view script').each(function (index, element) { eval(element.innerHTML); })
– Jerzy Gebler
Aug 19 '15 at 16:01
...
Why do people say that Ruby is slow? [closed]
...at pretty much everything is a method lookup in Ruby - adding two numbers, indexing an array. Where other languages expose hacks (Python's __add__ method, Perl's overload.pm) Ruby does pure OO in all cases, and this can hurt performance if the compiler/interpreter is not clever enough.
If I were wr...
How to debug PDO database queries?
...g($sql_string, array $params = null) {
if (!empty($params)) {
$indexed = $params == array_values($params);
foreach($params as $k=>$v) {
if (is_object($v)) {
if ($v instanceof \DateTime) $v = $v->format('Y-m-d H:i:s');
else continu...