Table 7-3. Logical Operators (table 7-3 logical operators)
Example name result?/font>
$a and $b and true of both $a and $b is true.? /FONT>
$a or $b or?/font> true if either $a or $b is true.? /FONT>
$a xor $b or?/font> true if either $a Or $b is true, and not both.? /FONT>
! $a not?/font> True if $a is not True.? /FONT>
$a && $b and?/font> true of both $a and $b is true.? /FONT>
$a | | $b or?/font> True if either $a Or $b is true.
The changes in the two different "and" and "or" operators are actually caused by the different priority levels of the operation. (Refer to the following section.) ）
http://www.bkjia.com/PHPjc/531974.html www.bkjia.com true http://www.bkjia.com/PHPjc/531974.html techarticle Table 7-3. Logical Operators (table 7-3 logical operator) example name result?/font> $a and $b and true of both $a and $b is true. /FONT> $a or $b or?/font> True if either $a or $b ...
