PHP mobile internet development operator

PHP100 is the first professional website in China to share PHP resources. It also provides a PHP Chinese communication community. For PHP study researchers: The latest PHP information, original content, open source code and PHP video tutorials and other related content. [Introduction] I. PHP operator PHP has a rich set of operators, most of which are directly from the C language. Operators can be divided into arithmetic operators, string operators, value assignment operators, bitwise operators, conditional operators, and logical operators. When various operators are in the same

PHP has a rich set of operators, most of which are directly from the C language. Operators can be divided into arithmetic operators, string operators, value assignment operators, bitwise operators, conditional operators, and logical operators. When operators are in the same expression, their operations have a certain priority.

(1) arithmetic operations

+-*/% + + --

(2) string operators

The character string operator has only one. (point), which is an English ending. It can connect a string to form a new string, or connect a string to a number. the type is automatically converted.

$ A = "dawanganban"; $ B = "123"; echo $ a. $ B; // output result: dawanganban123

(3) value assignment operator

= + =-= * =/= % =. = $ A = "dawanganban"; $. = 1; $. = 2; $. = 3; echo $. $ B; // output result: dawanganban123

(4) bitwise operators

& | ~ ^ <>

(5) comparison operators

><>==! = <>==! =

<>: Not equal to or! = Same

===: Constant, equal value and consistent type

! ==: Non-constant, with inconsistent values or types

1. Echo 5 = "5"; // true PHP is a weak language (variables in js are similar) echo 5 = "5"; // false is completely equal

2. 
   

(6) logical operations

AND (logical AND) OR (logical OR) XOR (logical OR) & (logical AND) | (logical OR )! (Non-logical)

var_dump(5 && "");   //false  var_dump(5 && "2"); //true  var_dump(5 || ""); //true  var_dump(0 xor 1); //true  var_dump(0 xor 0); //false  var_dump(1 xor 1); //false

I. PHP operators

PHP has a rich set of operators, most of which are directly from the C language. Operators can be divided into arithmetic operators, string operators, value assignment operators, bitwise operators, conditional operators, and logical operators. When operators are in the same expression, their operations have a certain priority.

(1) arithmetic operations

+-*/% + + --

(2) string operators

The character string operator has only one. (point), which is an English ending. It can connect a string to form a new string, or connect a string to a number. the type is automatically converted.

$ A = "dawanganban"; $ B = "123"; echo $ a. $ B; // output result: dawanganban123

(3) value assignment operator

= + =-= * =/= % =. = $ A = "dawanganban"; $. = 1; $. = 2; $. = 3; echo $. $ B; // output result: dawanganban123

(4) bitwise operators

& | ~ ^ <>

(5) comparison operators

><>==! = <>==! =

<>: Not equal to or! = Same

===: Constant, equal value and consistent type

! ==: Non-constant, with inconsistent values or types

1. Echo 5 = "5"; // true PHP is a weak language (variables in js are similar) echo 5 = "5"; // false is completely equal

2. 
   

(6) logical operations

AND (logical AND) OR (logical OR) XOR (logical OR) & (logical AND) | (logical OR )! (Non-logical)

var_dump(5 && "");   //false  var_dump(5 && "2"); //true  var_dump(5 || ""); //true  var_dump(0 xor 1); //true  var_dump(0 xor 0); //false  var_dump(1 xor 1); //false

The above is a detailed description of PHP mobile internet development operators. For more information, see other related articles in the first PHP community!