Php (5) PHP operators

Operator Number (PHP) operator symbols are divided into the following functions by operator number: i. arithmetic operators +-* % ++ -- 2. string operators can be called join operators. 3. value assignment operators: = + =-= * = % = 4. operator numbers (PHP) operators can be divided into: 1. arithmetic operators +-*/% + + -- 2. string operators. it can be called join operator number 3, value assignment operator = + =-= * =/= % =. = 4. Comparison operators ><======! = Or <>! = 5. logical operators & and | or! Or not 6, bit operator & | ^ ~ <>>>> 7. Other operators?: ''>->::&$ % Has two purposes: Division operation; control range, do not use decimal places, do not use negative % to convert the numbers on both sides into integers before division. $ A ++; // $ a = $ a + 1; First add 1 + + $ a with the variable; // $ a = $ a + 1; first use auto Increment 1 and then use the variable $ a --; // $ a = $ A-1; first use the variable and then subtract 1 -- $ a; // $ a = $ A-1; first use auto-minus 1 and then use the variable bit operator & (bitwise AND): Set the bitwise of 1 in parameters 1 and 2 to 1, other values are set to 0 | (by bit OR): Set the bits in parameter 1 or parameter 2 to 1, and the remaining values to 0 ^ (by bit or by bit ): set the bits in parameters 1 and 2 to 1, and the same bits to 0 ~ (Not by bit): Set 1 to 0 in the parameter, and 0 to 1 in the parameter <(right shift)> (left shift)