What is the difference between php <> and !=?

php What is the difference between <> and !=? The following article will introduce it to you. It has certain reference value. Friends in need can refer to it. I hope it will be helpful to everyone.

##The difference between php <> and !=

<> and != are all judged to be unequal.

In the early days, PHP used

<>, and later upgraded to !=. There is basically no difference between the two, it depends on personal coding habits.

<> has the same effect as !=, there is no difference; however, it is recommended to use !=, which is more readable high.

But it’s just the opposite in mysql. != is the early SQL standard, <> is the current SQL standard, and it is recommended to use <>.

Extension:

PHP comparison operator

PHP comparison operator is used to compare two values ​​(numbers or strings):

OperatorNameExampleResult==Equals$x == $yReturns true if $x is equal to $y. ===Congruent (identical) $x === $yIf $x is equal to $y, and they are of the same type, return true. ##<> is not equal to $x <> $yReturns true if $x is not equal to $y. !==><>=<=For more related knowledge, please pay attention to

!=	is not equal to	$x != $y	Returns true if $x is not equal to $y.
Not congruent (completely different)	$x !== $y	if Returns true if $x is not equal to $y, or they are not of the same type.
is greater than	$x > $y	Returns true if $x is greater than $y.
is less than	$x < $y	Returns true if $x is less than $y.
Greater than or equal to	$x >= $y	If $x is greater than or equal to $ y, then return true.
is less than or equal to	$x <= $y	if Returns true if $x is less than or equal to $y.

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