Question

我正在创建一个Web应用程序，我希望将所有对用户的响应存储在语言文件中以便于编辑。所以我使用eval（）管理动态消息，所以：

$msg = 'Hello $user, your favorite color is $color';

$colors =  array("red","green","blue","yellow");
$users =  array("bob","craig","ted","dirty sanchez");

foreach($users as $key => $user){

 $color = $colors[$key];
 eval("\$newmsg = \"$msg\";");
 echo $newmsg;


}

我想知道这是最好的方法还是有更好的方法？

Answer 1

如果没有必要，切勿使用该死的eval！您的代码不起作用，您应该使用sprintf作为您的目的。

$messageFormat = 'Hello %s, your favorite color is %s';

$colors =  array("red","green","blue","yellow");
$users =  array("bob","craig","ted","dirty sanchez");
foreach($users as $key => $user){
   $color = $colors[$key];
   $actualMessage = sprintf($messageFormat, $user, $color);
   echo htmlentities($actualMessage);
}

假设您将此用于评论或其他用户提供的文字，我已添加htmlentities()以阻止XSS。

Answer 2

你需要的是printf函数。你可以定义一个字符串，并将％s作为字符串的占位符。

然后致电

printf($variable, $string1, $string2, $string);

第一个％s被$ string1替换，依此类推。

在你的例子中，我会使用vsprintf返回字符串，你可以给出一个数组，这样你可以提供你喜欢的每个params数组和输入字符串

继承你的榜样：

   <?
$msg = 'Hello %s, your favorite color is %s';
$colors =  array("red","green","blue","yellow");
$users =  array("bob","craig","ted","dirty sanchez");
foreach($users as $key => $user){
 $color = $colors[$key];
 $newmsg = vsprintf($msg,array($user,$color));
 echo $newmsg."\n";
}

?>

Answer 3

我更喜欢这种方式：

<?php

$msg = 'Hello [USER], your favorite color is [COLOR]';

$colors =  array("red","green","blue","yellow");
$users =  array("bob","craig","ted","dirty sanchez");

foreach($users as $key => $user)
{
    $color = $colors[$key];

    $newmsg = str_replace(array('[USER]', '[COLOR]'), array($user, $color), $msg);
    echo $newmsg;
}
?>

Answer 4

$colors =  array("red","green","blue","yellow");
$users =  array("bob","craig","ted","dirty sanchez");
$messages = array_combine($colors, $users);

foreach ($messages as $color => $user)
{
     echo "Hello $user, your favourite color is $color";
}

使用array_combine以$ keys =＆gt;格式创建数组; $ values生成以下数组：

"red" => "bob",
"green" => "craig",
"blue" => "ted",
"yellow" => "dirty sanches"

Answer 5

您可以使用strtr功能

$msg = 'Hello @user, your favorite color is @color';
echo strtr($msg, array('@user'=>'bob', '@color'=>'red'));

输出：

Hello bob, your favorite color is red

php eval功能和性能

5 个答案: