我正在从书中做这个代码,我似乎无法让它工作
<html>
<head> <h3> <u> PHP tutorials </u> </h3> </head>
<body>
<?php
$Texas = "large";
$RhodeIsland = "small";
$statement = "Texas";
echo "$statement is $($statement)<br>";
$statement = "RhodeIsland";
echo "$statement is $($statement)<br>";
?>
</body>
</html>
这是我不断得到的输出:
德克萨斯州是(德克萨斯州)
RhodeIsland是$(RhodeIsland)
而不是:
德克萨斯州很大
RhodeIsland很小
答案 0 :(得分:3)
语法为:${$variable_name}
,而不是$($variable_name)
。您需要将代码更改为:
$statement = "Texas";
echo "$statement is ${$statement}<br>";
答案 1 :(得分:0)
你去了:
<?php
$Texas = "large";
$RhodeIsland = "small";
$statement = "Texas";
echo $statement." is ".${$statement}."<br />";
$statement = "RhodeIsland";
echo $statement." is ".${$statement} ."<br />";
?>
答案 2 :(得分:0)
您应该使用花括号而不是括号。
$statement = "RhodeIsland";
echo "$statement is ${$statement}<br>";
关于这个主题的PHP文档在这里:http://www.php.net/manual/en/language.variables.variable.php
答案 3 :(得分:0)
这有效:)
<?php
$Texas = "large";
$RhodeIsland = "small";
$statement = "Texas";
echo $statement." is ".$$statement."<br>";
$statement = "RhodeIsland";
echo $statement." is ".$$statement."<br>";