Operadores PHP
Operadores PHP
Los operadores se utilizan para realizar operaciones en variables y valores.
PHP divide a los operadores en los siguientes grupos:
- Operadores aritméticos
- Operadores de Asignación
- Operadores de comparación
- Operadores de incremento/decremento
- Operadores logicos
- Operadores de cadena
- Operadores de matriz
- Operadores de asignación condicional
Operadores aritméticos de PHP
Los operadores aritméticos de PHP se utilizan con valores numéricos para realizar operaciones aritméticas comunes, como suma, resta, multiplicación, etc.
| Operator | Name | Example | Result | Show it |
|---|---|---|---|---|
| + | Addition | $x + $y | Sum of $x and $y | |
| - | Subtraction | $x - $y | Difference of $x and $y | |
| * | Multiplication | $x * $y | Product of $x and $y | |
| / | Division | $x / $y | Quotient of $x and $y | |
| % | Modulus | $x % $y | Remainder of $x divided by $y | |
| ** | Exponentiation | $x ** $y | Result of raising $x to the $y'th power |
Operadores de asignación de PHP
Los operadores de asignación de PHP se utilizan con valores numéricos para escribir un valor en una variable.
El operador de asignación básico en PHP es "=". Significa que el operando de la izquierda se establece en el valor de la expresión de asignación de la derecha.
| Assignment | Same as... | Description | Show it |
|---|---|---|---|
| x = y | x = y | The left operand gets set to the value of the expression on the right | |
| x += y | x = x + y | Addition | |
| x -= y | x = x - y | Subtraction | |
| x *= y | x = x * y | Multiplication | |
| x /= y | x = x / y | Division | |
| x %= y | x = x % y | Modulus |
Operadores de comparación de PHP
Los operadores de comparación de PHP se utilizan para comparar dos valores (número o cadena):
| Operator | Name | Example | Result | Show it |
|---|---|---|---|---|
| == | Equal | $x == $y | Returns true if $x is equal to $y | |
| === | Identical | $x === $y | Returns true if $x is equal to $y, and they are of the same type | |
| != | Not equal | $x != $y | Returns true if $x is not equal to $y | |
| <> | Not equal | $x <> $y | Returns true if $x is not equal to $y | |
| !== | Not identical | $x !== $y | Returns true if $x is not equal to $y, or they are not of the same type | |
| > | Greater than | $x > $y | Returns true if $x is greater than $y | |
| < | Less than | $x < $y | Returns true if $x is less than $y | |
| >= | Greater than or equal to | $x >= $y | Returns true if $x is greater than or equal to $y | |
| <= | Less than or equal to | $x <= $y | Returns true if $x is less than or equal to $y | |
| <=> | Spaceship | $x <=> $y | Returns an integer less than, equal to, or greater than zero, depending on if $x is less than, equal to, or greater than $y. Introduced in PHP 7. |
Operadores PHP de incremento/decremento
Los operadores de incremento de PHP se utilizan para incrementar el valor de una variable.
Los operadores de decremento de PHP se utilizan para decrementar el valor de una variable.
| Operator | Name | Description | Show it |
|---|---|---|---|
| ++$x | Pre-increment | Increments $x by one, then returns $x | |
| $x++ | Post-increment | Returns $x, then increments $x by one | |
| --$x | Pre-decrement | Decrements $x by one, then returns $x | |
| $x-- | Post-decrement | Returns $x, then decrements $x by one |
Operadores lógicos de PHP
Los operadores lógicos de PHP se utilizan para combinar sentencias condicionales.
| Operator | Name | Example | Result | Show it |
|---|---|---|---|---|
| and | And | $x and $y | True if both $x and $y are true | |
| or | Or | $x or $y | True if either $x or $y is true | |
| xor | Xor | $x xor $y | True if either $x or $y is true, but not both | |
| && | And | $x && $y | True if both $x and $y are true | |
| || | Or | $x || $y | True if either $x or $y is true | |
| ! | Not | !$x | True if $x is not true |
Operadores de cadenas PHP
PHP tiene dos operadores que están especialmente diseñados para cadenas.
| Operator | Name | Example | Result | Show it |
|---|---|---|---|---|
| . | Concatenation | $txt1 . $txt2 | Concatenation of $txt1 and $txt2 | |
| .= | Concatenation assignment | $txt1 .= $txt2 | Appends $txt2 to $txt1 |
Operadores de matriz de PHP
Los operadores de matrices de PHP se utilizan para comparar matrices.
| Operator | Name | Example | Result | Show it |
|---|---|---|---|---|
| + | Union | $x + $y | Union of $x and $y | |
| == | Equality | $x == $y | Returns true if $x and $y have the same key/value pairs | |
| === | Identity | $x === $y | Returns true if $x and $y have the same key/value pairs in the same order and of the same types | |
| != | Inequality | $x != $y | Returns true if $x is not equal to $y | |
| <> | Inequality | $x <> $y | Returns true if $x is not equal to $y | |
| !== | Non-identity | $x !== $y | Returns true if $x is not identical to $y |
Operadores de asignación condicional de PHP
Los operadores de asignación condicional de PHP se utilizan para establecer un valor según las condiciones:
| Operator | Name | Example | Result | Show it |
|---|---|---|---|---|
| ?: | Ternary | $x = expr1 ? expr2 : expr3 | Returns the value of $x. The value of $x is expr2 if expr1 = TRUE. The value of $x is expr3 if expr1 = FALSE |
|
| ?? | Null coalescing | $x = expr1 ?? expr2 | Returns the value of $x. The value of $x is expr1 if expr1 exists, and is not NULL. If expr1 does not exist, or is NULL, the value of $x is expr2. Introduced in PHP 7 |