PHP Tips: Use json_encode() to assign values ​​to js arrays

This article explains in detail the relevant content of json_encode() assigning values ​​to js arrays.

1. Cleverly use json_encode() to assign values ​​to js arrays

Many times, we have to pay the results processed by PHP to js for processing. However, when assigning values ​​to js, ​​the assignment of a single variable is relatively simple and easy to implement. Just output the PHP variable directly through the template tag. For example:

PHP：
$this->title='I love THINKPHP';
JS:
<script>
var title="{$title}";
</script>

In this way, the $title value of the PHP variable can be processed in js~

However, when we process the array with PHP When assigning values ​​to an array in js, you will encounter many problems. If you assign a value directly like a single variable, js cannot read each element in the array.

In practical applications, I used the json_encode() function to process PHP arrays. In this way, the PHP-processed arrays can be easily sent to js in json data format. Similarly, js Get an array that is also in json data format. For example:

PHP：
$this->myarr=array('Think','PHP','China');
JS:
<script>
var myarray={:json_encode($myarr)};  //注意，这里不要用双引号或单引号；
var arr = <!--?php echo json_encode($arr, JSON_PRETTY_PRINT) ?-->;
</script>

At this time, myarray=['Think','PHP','China']; in js is such an array in json format, which is in js Processing is fairly easy in Medium Processing.

With the json_encode() function, you can easily assign PHP arrays to js arrays~

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