第七章 PHP3 表达式
比较操作符
比较操作符，正如它的名字所示，允许您比较两个值。
Table 7-4. Comparson Operators（表7-4 比较操作符）
| example | name | result?/FONT> |
| $a == $b | Equal?/FONT> | True if $a is equal to $b.?/FONT> |
| $a != $b | Not equal | True if $a is not equal to $b.?/FONT> |
| $a < $b | Less than?/FONT> | True if $a is strictly less than $b.?/FONT> |
| $a > $b | Greater than?/FONT> | True if $a is strictly greater than $b.?/FONT> |
| $a <= $b | Less than or equal to?/FONT> | True if $a is less than or equal to $b.?/FONT> |
| $a >= $b | Greater than or equal to?/FONT> | True if $a is greater than or equal to $b. |