What does <> mean in php

In PHP, "" means "not equal to" and is a comparison operator. The syntax is "operand 1 operand 2", which is used to compare two operations. Whether the values ​​of the numbers are not equal; during comparison, the data type will be converted. If the value of operand 1 and the value of operand 2 are not equal after type conversion, TRUE will be returned, otherwise FALSE will be returned.

The operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer

In php, "" means "not equal to" and is a comparison operator.

Syntax format:

操作数1 <> 操作数2

The "<>" operator has the same function as !=, and can compare the two operands. Whether the values ​​are not equal.

The "<>" operator only performs a comparison operation on the values ​​​​of the two operands; therefore, data type conversion will be performed during the comparison.

If the value of operand 1 and the value of operand 2 are not equal after type conversion, TRUE is returned, otherwise FALSE is returned.

Example:

<?php
header(&#39;content-type:text/html;charset=utf-8&#39;);   
$a = 10;
$b = &#39;10&#39;;
if($a <> $b){
    echo &#39;$a 和 $b 的值不相等！<br>&#39;;
}else{
    echo &#39;$a 和 $b 的值相等！<br>&#39;;
}
?>

#In the above example, the variable $a is 10 of numeric type, and the value of variable $b is a string Of 10, the two variables are of different types but have equal values.

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