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What is the difference between is_a and instanceof?
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Update
As of PHP 5.3.9, the functionality of is_a() has changed. The original answer below states that is_a() must accept an Object as the first argument, but PHP versions >= 5.3.9 now accept an optional third boolean argument $allow_s...
how to check and set max_allowed_packet mysql variable [duplicate]
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max_allowed_packet
is set in mysql config, not on php side
[mysqld]
max_allowed_packet=16M
You can see it's curent value in mysql like this:
SHOW VARIABLES LIKE 'max_allowed_packet';
You can try to change it like this, but it's unlikely this will work on shared hostin...
insert multiple rows via a php array into mysql
I'm passing a large dataset into a MySQL table via PHP using insert commands and I'm wondering if its possible to insert approximately 1000 rows at a time via a query other than appending each value on the end of a mile long string and then executing it. I am using the CodeIgniter framework so its f...
How to change max_allowed_packet size
...ce mysqld restart
8) You can check the change in the variables section on phpmyadmin
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How to execute a Python script from the Django shell?
...un a script that import models, views, etc.
– Danilo Cabello
Jul 11 '14 at 16:04
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How to search by key=>value in a multidimensional array in PHP
...lue; the ampersand & is crucial.
FYI: If you have an older version of PHP then you have to specify the pass-by-reference part in the call to search_r rather than in its declaration. That is, the last line becomes search_r($subarray, $key, $value, &$results).
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Performance of foreach, array_map with lambda and array_map with static function
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FWIW, I just did the benchmark since poster didn't do it. Running on PHP 5.3.10 + XDebug.
UPDATE 2015-01-22 compare with mcfedr's answer below for additional results without XDebug and a more recent PHP version.
function lap($func) {
$t0 = microtime(1);
$numbers = range(0, 1000000);
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How to force a web browser NOT to cache images
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I use PHP's file modified time function, for example:
echo <img src='Images/image.png?" . filemtime('Images/image.png') . "' />";
If you change the image then the new image is used rather than the cached one, due to havi...
Convert DateTime to String PHP
I have already researched a lot of site on how can I convert PHP DateTime object to String. I always see "String to DateTime" and not "DateTime to String"
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Converting timestamp to time ago in PHP e.g 1 day ago, 2 days ago…
... 2009-09-12 20:57:19 and turn it into something like 3 minutes ago with PHP.
30 Answers
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