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Best way to test for a variable's existence in PHP; isset() is clearly broken
...f isset().
Since this is takes the array to check as a function argument, PHP will still raise "notices" if the array itself doesn't exist. In some cases, it can validly be argued that each dimension should have been initialised first, so the notice is doing its job. For other cases, a "recursive" ...
What's wrong with using $_REQUEST[]?
...to the much more sensible GP (no C) order with the request_order config in PHP 5.3. Where this is not possible, I personally would avoid $_REQUEST and, if I needed a combined GET+POST array, create it manually.
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Never seen before C++ for loop
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@Izkata: It isn't EVER an operator, it's parsed as a -- token followed by a > token. Two separate operators. A "down to zero" loop is just a straightforward combination of post-decrement and greater-than. C++ operator overloading doesn't create new operators, it just repurpo...
Does C++ support 'finally' blocks? (And what's this 'RAII' I keep hearing about?)
...t even managed languages provide a finally-block despite resources being deallocated automatically by the garbage collector anyway?
Actually, languages based on Garbage collectors need "finally" more. A garbage collector does not destroy your objects in a timely manner, so it can not be relied upo...
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 can I store my users' passwords safely?
... MD5 ? I've just started looking into password security. I'm pretty new to PHP.
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Fastest way to reset every value of std::vector to 0
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does assigning it to a new vector do heap allocation ? and then discard the allocation of the existing vector ? I could see that being slower than memset et al
– Conrad Jones
Jan 12 '18 at 19:40
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Memcached vs APC which one should I choose? [closed]
...lways use an opcode cache, which APC is (also APC will get integrated into php6 iirc, so why not start using it now).
You can/should use both for different purposes.
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Converting a UNIX Timestamp to Formatted Date String
Using PHP, I want to convert UNIX timestamps to date strings similar to this: 2008-07-17T09:24:17Z
9 Answers
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Single vs Double quotes (' vs ")
...b Development often consists of many programming languages. HTML, JS, CSS, PHP, ASP, RoR, Python, ect. Because of this we have many syntax conventions for different programing languages. Often habbits from one language will follow us to other languages, even if it is not considered "proper" i.e. com...