PHP -operateurs
PHP-operateurs
Operateurs word gebruik om bewerkings op veranderlikes en waardes uit te voer.
PHP verdeel die operateurs in die volgende groepe:
- Rekenkundige operateurs
- Opdrag operateurs
- Vergelykingsoperateurs
- Verhoog/Verminder operateurs
- Logiese operateurs
- Stringoperateurs
- Skikking operateurs
- Voorwaardelike opdrag operateurs
PHP rekenkundige operateurs
Die PHP rekenkundige operateurs word gebruik met numeriese waardes om algemene rekenkundige bewerkings uit te voer, soos optel, aftrek, vermenigvuldiging, ens.
| 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 |
PHP-opdragoperateurs
Die PHP-opdragoperateurs word met numeriese waardes gebruik om 'n waarde na 'n veranderlike te skryf.
Die basiese opdragoperateur in PHP is "=". Dit beteken dat die linker operand op die waarde van die opdraguitdrukking aan die regterkant gestel word.
| 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 |
PHP-vergelykingsoperateurs
Die PHP-vergelykingsoperateurs word gebruik om twee waardes (getal of string) te vergelyk:
| 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 $y. Introduced in PHP 7. |
PHP verhoog / verminder operateurs
Die PHP-inkrementoperateurs word gebruik om 'n veranderlike se waarde te verhoog.
Die PHP-dekrementoperateurs word gebruik om 'n veranderlike se waarde te verlaag.
| Operator | Name | Description | Show it |
|---|---|---|---|
| ++$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 |
PHP logiese operateurs
Die PHP logiese operateurs word gebruik om voorwaardelike stellings te kombineer.
| 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 |
PHP-stringoperateurs
PHP het twee operateurs wat spesiaal vir snare ontwerp is.
| Operator | Name | Example | Result | Show it |
|---|---|---|---|---|
| . | Concatenation | $txt1 . $txt2 | Concatenation of $txt1 and $txt2 | |
| .= | Concatenation assignment | $txt1 .= $txt2 | Appends $txt2 to $txt1 |
PHP Skikking-operateurs
Die PHP skikking operateurs word gebruik om skikkings te vergelyk.
| 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 |
PHP Voorwaardelike Opdrag Operateurs
Die PHP voorwaardelike opdrag operateurs word gebruik om 'n waarde te stel afhangende van toestande:
| 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 |