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Chapter 10. Operators |
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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.
(expr1) ? (expr2) : (expr3);
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This expression evaluates to expr2 if expr1 evaluates to
TRUE, and expr3 if expr1 evaluates to
FALSE.
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