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PHP comparison operators are used to compare two values (numbers or strings). Today we will introduce the inequality operator.
!=, not equal to operator, returns true if $x is not equal to $y. (Recommended learning: PHP video tutorial)
<!DOCTYPE html> <html> <body> <?php $x = 17; $y = "17"; var_dump($x != $y); // 返回 false，因为值相等 ?> </body> </html>
a8093152e673feb7aba1828c43532094, not equal to operator, returns true if $x is not equal to $y.
<!DOCTYPE html> <html> <body> <?php $x = 17; $y = "17"; var_dump($x <> $y); // 返回 false，因为值相等 ?> </body> </html>
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