002-var_dump用法

<?php
$a = 2150;                        //小刘的工资2150
$b = 2240;                        //小李的工资2240
echo "a=" . $a . "&nbsp;&nbsp;b=" . $b . "<br>";
 
echo var_dump($a) . "<br>";
echo var_dump($b) . "<br>";
 
echo "a < b的返回值为：&nbsp;";
echo var_dump($a < $b) . "<br>";          //比较a是否小于b
echo "a >= b的返回值为：&nbsp;";
echo var_dump($a >= $b) . "<br>";        //比较a是否大于等于b
echo "a == b的返回值为：&nbsp;";
echo var_dump($a == $b) . "<br>";        //比较a是否等于b
echo "a != b的返回值为：&nbsp;";
echo var_dump($a != $b) . "<br>";        //比较a是否不等于b
echo var_dump($a);
?>