What are the comparison operators in php?

PHP provides a wide range of comparison operators for checking whether two values ​​are equal: ==: Values ​​and types are equal!=: Values ​​are not equal===: Values ​​and types are equal!==: Values ​​or types are not equal<: left operand is less than right operand<=: left operand is less than or equal to right operand: left operand is greater than right operand=: left operand is greater than or equal to right operand

PHP Comparison Operators

PHP provides a series of comparison operators for comparing whether two values ​​are equal. These operators are essential for evaluating and processing expressions.

Operator list:

##>=Check whether the left operand is greater than or equal to the right operand

Example:

<code class="php">$a = 10;
$b = 15;

echo ($a == $b); // 输出: false
echo ($a != $b); // 输出: true
echo ($a === $b); // 输出: false
echo ($a !== $b); // 输出: true
echo ($a < $b); // 输出: true
echo ($a <= $b); // 输出: true
echo ($a > $b); // 输出: false
echo ($a >= $b); // 输出: false</code>

Note:

##Use

==
• and != operator, PHP performs a relaxed comparison, implicitly converting values ​​of different types for comparison. When using the
===
• and !== operators, PHP performs a strict comparison, requiring two values ​​to be equal in both value and type. The result of a comparison operator is always a Boolean value (
true
• or false).

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php 运算符 比较运算符

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Operator	Description
==	Check whether two values ​​are equal (value and type are equal)
!=	Check both Whether the values ​​are not equal
===	Check whether the two values ​​are strictly equal (the value and type must be the same)
!==	Check whether two values ​​are strictly not equal
<	Check whether the left operand is less than the right operand
<=	Check whether the left operand is less than or equal to the right operand
>	Check whether the left operand is greater than the right operand