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Most efficient way to determine if a Lua table is empty (contains no entries)?
... @Moberg the less dumbed down version, in the context of lua 5.2 & 5.3, is that non locals are either upvals or _ENV lookups. An upval has to go through an extra layer of indirection, whereas an _ENV lookup is a table lookup. Whereas a local is a register in the VM
– De...
How do I grep recursively?
...only works on newer greps. It doesn't work on the grep that comes with AIX 5.3 for example.
– Withheld
Feb 1 '13 at 13:09
112
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Composer killed while updating
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Composer is apparently know to run slower in older versions of PHP (e.g. 5.3x). It was still slow in 5.5.9 for me...
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Coalesce function for PHP?
...
There is a new operator in php 5.3 which does this: ?:
// A
echo 'A' ?: 'B';
// B
echo '' ?: 'B';
// B
echo false ?: 'B';
// B
echo null ?: 'B';
Source: http://www.php.net/ChangeLog-5.php#5.3.0
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How do I convert an object to an array?
...her encoding, let say Win1250, it will fail, as json_encode will fail (php 5.3)
– Radek
Dec 3 '13 at 14:40
How to conv...
Weird PHP error: 'Can't use function return value in write context'
...ure that's legal in later PHP versions like 5.6, but I think it doesn't in 5.3
– UnsettlingTrend
Dec 8 '16 at 16:14
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Convert from MySQL datetime to another format with PHP
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Finally the right solution for PHP 5.3 and above:
(added optional Timezone to the Example like mentioned in the comments)
$date = \DateTime::createFromFormat('Y-m-d H:i:s', $mysql_source_date, new \DateTimeZone('UTC'));
$date->setTimezone(new \DateTimeZone...
PHP and Enumerations
...r multiple enums).
Now that most people have finally upgraded to at least 5.3, and SplEnum is available, that is certainly a viable option as well--as long as you don't mind the traditionally unintuitive notion of having actual enum instantiations throughout your codebase. In the above example, Bas...
Get first day of week in PHP?
...ay this week')), "\n";
It differs a bit across PHP versions:
Output for 5.3.0 - 5.6.6, php7@20140507 - 20150301, hhvm-3.3.1 - 3.5.1
2015-03-16
2015-03-22
Output for 4.3.5 - 5.2.17
2015-03-23
2015-03-22
Output for 4.3.0 - 4.3.4
2015-03-30
2015-03-29
Comparing at Edge-Cases
Relative descr...
How to get time difference in minutes in PHP
...ns of PHP. Use the DateTime class to do any date calculations now that PHP 5.3 is the norm.
Eg.
$start_date = new DateTime('2007-09-01 04:10:58');
$since_start = $start_date->diff(new DateTime('2012-09-11 10:25:00'));
echo $since_start->days.' days total<br>';
echo $since_start->y.' ...