PHP运行时类型检查

Question

I am trying to figure out the order in which PHP check types/object during runtime. So I can become a better coder. Thanks

Which type do php check first. Does it validate if a object is Boolean first? null? array?

which faster:

if (ID != null)

if (ID !== false)

if (ID == 0)

Answer 1

These are micro-optimizations. Your time would be spent better optimizing something else.

I'm not sure if there are any comparisons on this, but check out http://www.phpbench.com.

Also, you may take a look at http://php.net/manual/en/types.comparisons.php and http://php.net/manual/en/language.operators.precedence.php, although they do not give you benchmarks.

Again, your time would likely be spent better focusing on optimizing something else.