Question

我有以下json编码的数组，我按如下方式传递给JQuery，当数组中有元素时，一切正常。但是，有时候数组可能是空的根据用户选择，这就是我的脚本崩溃的地方：

PHP
$myleaderarray =  [{"Week_count":"3","Userid":"102","Username":"gsd555","MedCondPrimary":"Diabetes"},{"Week_count":"0","Userid":"216","Username":"gsd3","MedCondPrimary":"Cardiac Respiratory"}]
$count = count($myleaderarray);   //1

JQ
var myleaderarray = <?php echo $myleaderarray; ?>; // this passes the       array as expected
console.log(myleaderarray.length); //2

这是我在json_encoded数组为空时在控制台中看到的

JQ
var myleaderarray = ;
"Unexpected token ';'"

我似乎无法在JQ中测试此错误，所以我必须在服务器端执行此操作，或者我完全错过了什么吗？谢谢你的帮助。

Answer 1

变化：

var myleaderarray = `<?php echo $myleaderarray; ?>;`

到

var myleaderarray = "<?php echo $myleaderarray ?>";

Answer 2

$myleaderarray =  ['{"Week_count":"3","Userid":"102","Username":"gsd555","MedCondPrimary":"Diabetes"}','{"Week_count":"0","Userid":"216","Username":"gsd3","MedCondPrimary":"Cardiac Respiratory"}'];
$count = count($myleaderarray);   // is now two

JQ
var myleaderarray = <?php var_dump($myleaderarray); ?>; // this passes the       array as expected
console.log(myleaderarray.length);

将空的json_encode数组传递给JQuery

2 个答案: