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Дата изменения: Sun Feb 3 22:33:29 2002 Дата индексирования: Tue Oct 2 13:31:16 2012 Кодировка: |
Comparison operators, as their name implies, allow you to compare two values.
Table 10-3. Comparison Operators
Example | Name | Result |
---|---|---|
$a == $b | Equal | TRUE if $a is equal to $b. |
$a === $b | Identical | TRUE if $a is equal to $b, and they are of the same type. (PHP 4 only) |
$a != $b | Not equal | TRUE if $a is not equal to $b. |
$a <> $b | Not equal | TRUE if $a is not equal to $b. |
$a !== $b | Not identical | TRUE if $a is not equal to $b, or they are not of the same type. (PHP 4 only) |
$a < $b | Less than | TRUE if $a is strictly less than $b. |
$a > $b | Greater than | TRUE if $a is strictly greater than $b. |
$a <= $b | Less than or equal to | TRUE if $a is less than or equal to $b. |
$a >= $b | Greater than or equal to | TRUE if $a is greater than or equal to $b. |
Another conditional operator is the "?:" (or ternary) operator, which operates as in C and many other languages.
This expression evaluates to expr2 if expr1 evaluates to TRUE, and expr3 if expr1 evaluates to FALSE.