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Difference between float and double in php?
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There is no difference in PHP. float, double or real are the same datatype.
At the C level, everything is stored as a double.
The real size is still platform-dependent.
See the manual for more details:
http://www.php.net/manual/en/language.types.flo...
Show a number to two decimal places
What's the correct way to round a PHP string to two decimal places?
24 Answers
24
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How to find day of week in php in a specific timezone
I am confused while using php to handle date/time.
12 Answers
12
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What's better at freeing memory with PHP: unset() or $var = null
... name says - unset a variable. It does not force immediate memory freeing. PHP's garbage collector will do it when it see fits - by intention as soon, as those CPU cycles aren't needed anyway, or as late as before the script would run out of memory, whatever occurs first.
If you are doing $whatever ...
How to debug Lock wait timeout exceeded on MySQL?
...-----+-------+
1 row in set (0.01 sec)
You can set it to higher value in /etc/my.cnf permanently with this line
[mysqld]
innodb_lock_wait_timeout=120
and restart mysql. If you cannot restart mysql at this time, run this:
SET GLOBAL innodb_lock_wait_timeout = 120;
You could also just set it for t...
PHP: exceptions vs errors?
Maybe I'm missing it somewhere in the PHP manual, but what exactly is the difference between an error and an exception? The only difference that I can see is that errors and exceptions are handled differently. But what causes an exception and what causes an error?
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Uppercase Booleans vs. Lowercase in PHP
When I was learning PHP, I read somewhere that you should always use the upper case versions of booleans, TRUE and FALSE , because the "normal" lowercase versions, true and false , weren't "safe" to use.
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What's the difference between a 302 and a 307 redirect?
...doing a DELETE at some location, you would redo your DELETE to the new URL
etc
Unfortunately every browser did it wrong. When getting a 302, they would always switch to GET at the new URL, rather than retrying the request with the same verb (e.g., POST):
Mosaic did it wrong
Netscape copied the bug...
通信连接组件 · App Inventor 2 中文网
...果与服务器的连接丢失（不是服务器关闭，而是 wifi 连接问题），则不会有任何事件触发（但崩溃现已修复）。
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Is there a PHP Sandbox, something like JSFiddle is to JS? [closed]
Is there a PHP Sandbox, something like JSFiddle is to JS?
1 Answer
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