Question

这是console.log('<?php print_r($graph) ?>');

的结果

{"H10":"98.25","I10":"59.00","H17":"59.26","I17":"26.10","H22":"0.00","I22":"1.84","H40":"0.00","I40":"0.00","H2":"14.88","I2":"8.80" }

我想通过java脚本中的键获取这些值，如何逐个获取这些值？

我试过了 console.log('<?php print_r($graph['H10']) ?>');但它无效

Answer 1

你在JavaScript中说过＆＃34;＆＃34;但你尝试这样做是在PHP。请记住，PHP在服务器上运行，并确定发送到浏览器的内容; JavaScript代码（在本例中）在浏览器中的客户端上运行。

如果您想在JavaScript中访问此数据，请先将其作为数据输出到您的JavaScript代码中。

不清楚PHP代码中包含的$graph，字符串或关联数组。

如果它是一个关联数组，请使用json_encode和echo：

var data = <?php echo(json_encode($graph)); ?>;

但是，我怀疑它是一个JSON格式的字符串，基于你试过的东西没有给你"98.25";在这种情况下，只需回应它：

var data = <?php echo($graph); ?>;

其中一个会将此信息发送到浏览器：

var data = {"H10":"98.25","I10":"59.00","H17":"59.26","I17":"26.10","H22":"0.00","I22":"1.84","H40":"0.00","I40":"0.00","H2":"14.88","I2":"8.80"};

然后，在浏览器上的JavaScript代码中，您有一个对象，其属性名称为H10等等：

console.log(data.H10);
// or
console.log(data["H10"]);

实例：

＆＃13;

var data = {"H10":"98.25","I10":"59.00","H17":"59.26","I17":"26.10","H22":"0.00","I22":"1.84","H40":"0.00","I40":"0.00","H2":"14.88","I2":"8.80"};

console.log(data.H10);
// or
console.log(data["H10"]);

＆＃13;

如果要遍历所有属性，可以使用Object.keys获取属性名称数组，并循环遍历它们：

Object.keys(data).forEach(function(name) {
    console.log(name + " = " + data[name]);
});

实例：

＆＃13;

var data = {"H10":"98.25","I10":"59.00","H17":"59.26","I17":"26.10","H22":"0.00","I22":"1.84","H40":"0.00","I40":"0.00","H2":"14.88","I2":"8.80"};

Object.keys(data).forEach(function(name) {
    console.log(name + " = " + data[name]);
});

＆＃13;

从数据集中获取价值

1 个答案: