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Strtotime() doesn't work with dd/mm/YYYY format
I really like the strtotime() function, but the user manual doesn't give a complete description of the supported date formats. strtotime('dd/mm/YYYY') doesn't work, it works only with mm/dd/YYYY format.
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Assign same value to multiple variables at once?
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@Eoin: In doing $var_a = $var_b = ... = new Class();, all the variables will reference the same instance of Class.
– Tim Cooper
Jun 21 '19 at 19:34
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When to encode space to plus (+) or %20?
...value is query value with a space, but the folder name in the path is literally foo+bar, not foo bar.
%20 is a valid way to encode a space in either of these contexts. So if you need to URL-encode a string for inclusion in part of a URL, it is always safe to replace spaces with %20 and pluses with ...
round() for float in C++
... but there are others such as round-to-even, which is less biased and generally better if you're going to do a lot of rounding; it's a bit more complex to implement though.
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MySQL ON DUPLICATE KEY - last insert id?
...le (a) VALUES (0)
ON DUPLICATE KEY UPDATE id=LAST_INSERT_ID(id), a=1
Is all here: http://dev.mysql.com/doc/refman/5.0/en/insert-on-duplicate.html
If a table contains an AUTO_INCREMENT column and INSERT ... UPDATE
inserts a row, the LAST_INSERT_ID() function returns the
AUTO_INCREMENT value. If t...
PHP regular expressions: No ending delimiter '^' found in
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PHP regex strings need delimiters. Try:
$numpattern="/^([0-9]+)$/";
Also, note that you have a lower case o, not a zero. In addition, if you're just validating, you don't need the capturing group, and can simplify the rege...
Error in strings.xml file in Android
... This can cause a problem when you have a lot of strings and use replace all. See my answer.
– Dan Bray
Oct 23 '18 at 14:08
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How do you get a timestamp in JavaScript?
...nd it returns the timestamp (without any alteration).
Details:
On almost all current browsers you can use Date.now() to get the UTC timestamp in milliseconds; a notable exception to this is IE8 and earlier (see compatibility table).
You can easily make a shim for this, though:
if (!Date.now) {
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PHP variables in anonymous functions
I was playing around with anonymous functions in PHP and realized that they don't seem to reach variables outside of them.
Is there any way to get around this problem?
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How can I check a C# variable is an empty string “” or null? [duplicate]
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@Lion Liu: Actually I think PHP has exactly as much to offer. See: php.net/manual/en/function.empty.php
– Milan
Feb 2 '16 at 20:09
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