PHP operator Process Control

PHP Operator Precedence:

Increment/Decrement (+ +/-) > Arithmetic operators (+ 、-、 *,/) > Size comparison > Logic with (&) > Logic or (| | ) > Three mesh > Assignment > and > or

Increment/Decrement

• Does not affect Boolean values
• No effect on null decrement
• Adds 1 to the null increment

Logical operations

• Short Circuit action
  • $a = True | | $b = = 3 $ b = = 3 does not execute
• Priority level
  • $a = False | | True $a result is true
  • $a = False or True $a result is false

Process Control

PHP iterates through the array in three ways:

• Using a For loop
  • Only index arrays can be traversed
• Using the Foreach Loop
  • The array pointer is reset
• Use the while, List (), each () combination
  • Array pointers are not reset

Switch ... case ... You can only judge shaping, floating point, string cannot be used for arrays, objects

　　

PHP operator Process Control