Comparison OperatorsPHP ManualPrevChapter 10. OperatorsNextComparison Operators
Comparison operators, as their name implies, allow you to compare
two values.
Table 10-3. Comparison Operatorsexamplenameresult$a == $bEqualTrue if $a is equal to $b.$a === $bIdenticalTrue if $a is equal to $b, and they are of the same
type. (PHP4 only)$a != $bNot equalTrue if $a is not equal to $b.$a < $bLess thanTrue if $a is strictly less than $b.$a > $bGreater thanTrue if $a is strictly greater than $b.$a <= $bLess than or equal to True if $a is less than or equal to $b.$a >= $bGreater than or equal to True if $a is greater than or equal to $b.
Another conditional operator is the "?:" (or trinary) operator,
which operates as in C and many other languages.
1
2 (expr1) ? (expr2) : (expr3);
3
This expression evaluates to expr2 if
expr1 evaluates to true, and
expr3 if
expr1 evaluates to false.
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