PHP が等しくありません

$variable1 != $variable2;
$variable1 <> $variable2;

<?php
//an integer value is stored in a variable called variable1
$variable1 = 10;
echo "The value stored in the first variable is: $variable1<br/>";
//a string value is stored in a variable called variable2
$variable2 = "10";
echo "The value stored in the second variable is: $variable2<br/>";
//not equal operator is used to compare the data type of the given two variables and return the result
echo "The result returned after using not equal operator is: ";
var_dump($variable1 != $variable2);
?>
<p><strong>出力:</strong></p>
<p><img  src="https://img.php.cn/upload/article/000/000/000/172490613638354.jpg" alt="PHP が等しくありません" ></p>
<p>上記のプログラムでは、variable1 という変数に整数値が格納されています。次に、文字列値がvariable2という変数に格納されます。両方の変数に格納される値は同じです。次に、等しくない演算子を使用して 2 つの変数のデータ型を比較します。変数に格納されている値が同じであっても、2 つの変数のデータ型が異なるため、等しくない演算子は false を返します。</p>
<h4>例 #2</h4>
<p>指定された 2 つの値のデータ型を比較し、出力を返す不等号演算子の動作を示す PHP プログラム。</p>
<p><strong>コード:</strong></p>


<pre class="brush:php;toolbar:false"><?php
//an integer value is stored in a variable called variable1
$variable1 = "Hello";
echo "The value stored in the first variable is: $variable1<br/>";
//a string value is stored in a variable called variable2
$variable2 = "Welcome";
echo "The value stored in the second variable is: $variable2<br/>";
//not equal operator is used to compare the data type of the given two variables and return the result
echo "The result returned after using not equal operator is: ";
var_dump($variable1 != $variable2);
?>

<?php
//an integer value is stored in a variable called variable1
$variable1 = 2.9999;
echo "The value stored in the first variable is: $variable1<br/>";
//a string value is stored in a variable called variable2
$variable2 = 10.55555;
echo "The value stored in the second variable is: $variable2<br/>";
//not equal operator is used to compare the data type of the given two variables and return the result
echo "The result returned after using not equal operator is: ";
var_dump($variable1 != $variable2);
?>

<?php
//an integer value is stored in a variable called variable1
$variable1 = "ffffff";
echo "The value stored in the first variable is: $variable1<br/>";
//a string value is stored in a variable called variable2
$variable2 = ffffff;
echo "The value stored in the second variable is: $variable2<br/>";
//not equal operator is used to compare the data type of the given two variables and return the result
echo "The result returned after using not equal operator is: ";
var_dump($variable1 != $variable2);
?>