PHP会自动将数字转换为字符串吗?

时间:2011-11-01 14:20:38

标签: php javascript json casting

我正在使用dojo和ajax向PHP发送时间戳,它会进行数据库检查,然后返回时间戳以进行调试。当我发送这个时间戳时,它是一个数字,当它返回时,它是一个字符串。这有什么特别的原因吗?我该怎么做才能避免这种情况(在PHP中转换为int,通过JSON修复或在javascript中转换为int)

这是Dojo代码

dojo.xhrGet({
 url: 'database/validateEmail.php',
 handleAs: "json",
 content: {
 email : 'George.Hearst@Pinkerton.dw',
 time: 0
 },
 load: function(args) {/*SEE BELOW*/}
});

这是PHP脚本

<?php

/**
 ** connect to the MySQL database and store the return value in $con
 *
 */
$con = mysql_pconnect("localhost:port", "username", "password");

/**
 ** handle exceptions if we could not connect to the database
 *
 */
if (!$con) {
    die('Could not connect: ' . mysql_error());
}

/**
 ** Create table query
 *
 */
mysql_select_db("portal", $con);

/**
 ** Get user entered e-mail
 *
 */
$emailQuerry = mysql_num_rows(mysql_query("SELECT EMAIL FROM user WHERE EMAIL='" . $_GET["email"] . "'")) == 1;

/**
 ** Whether successful or not, we will be returning the time stampe (this is used to determine whether there were any changes between the time a request
 ** was sent, and when this response was returned.
 *
 */
 $result['time'] = $_GET["time"];

/**
 ** Currently only checks to see if the two values were provided. Later, will have to check against passwords
 *
 */
if ($emailQuerry) {
    $result['valid'] = true;
}
else {
    $result['valid'] = false;
}

echo json_encode($result);
?>

最后,加载功能在

之上留空了
load: function(args) {
 console.log(localArgs.time + ' v ' + args.time);
 console.log(localArgs.time === args.time);
 console.log(localArgs.time == args.time);
}

其输出为

0 v 0
false
true

3 个答案:

答案 0 :(得分:3)

json_encode将所有变量编码为字符串。

因此javascript会将其视为字符串。

所以在javascript中你可以使用parseInt(...)

答案 1 :(得分:3)

您可以使用json_encode()通过JSON_NUMERIC_CHECK选项从PHP(后编码)输出您的数字。

答案 2 :(得分:1)

以整数形式发送整数很简单 - 为json_encode提供一个! 把'(int)'放在你要转换的任何东西周围。

以下是一个例子:

echo json_encode(array(1, 2, 3));

输出:

[1,2,3]


另一个:

$a = '123';
echo json_encode(array($a, (int) $a));

输出:

["123",123]