What happens when there are a lot of extra files when converting php to json?

When writing PHP web applications, developers often convert PHP arrays into JSON format for use in JavaScript. But sometimes a strange situation occurs, that is, after converting a PHP array into JSON format, its length will be significantly longer than the actual required length. This phenomenon is called "PHP to JSON is much longer".

In this article, we will explore the reasons why PHP to JSON conversion is too much and how to solve this problem.

1. There are many reasons for converting PHP to JSON

1. Incorrect data format

When converting PHP values ​​to JSON format, the PHP array must is an associative array, otherwise the JSON format will not be recognized correctly. If the PHP array contains indexed arrays, multidimensional arrays, or other types of arrays, this can cause a lot of delays in the PHP to JSON conversion.

2. Special characters

When non-alphanumeric characters (such as spaces, tabs, carriage returns, and line feeds) appear in a PHP array, it will cause PHP to convert JSON is a lot more.

3. Escape characters

If the PHP array contains escape characters, these characters will not be correctly converted into JSON format, resulting in a lot of errors when converting PHP to JSON .

2. How to solve many problems when converting PHP to JSON

1. Ensure the correct format of the PHP array

When converting PHP values ​​into JSON format, PHP arrays must be associative arrays. If the PHP array contains indexed arrays, multidimensional arrays, or other types of arrays, this can cause a lot of delays in the PHP to JSON conversion.

Sample code:

$json_array = array(
    'name' => 'Tom',
    'age' => 26,
    'hobby' => array('reading', 'writing', 'coding')
);
$json_data = json_encode($json_array);

2. Clear special characters

Clear special characters in the PHP array, you can use the PHP functions trim(), rtrim( ) and ltrim() to do it.

Sample code:

$json_data = json_encode(array_map('trim', $json_array));

3. Remove unnecessary escape characters

When the PHP array contains escape characters, you can use the PHP function stripslashes() removes them. Sample code:

$json_data = json_encode(stripslashes($json_array));

3. Summary

When writing PHP web applications, it is very important to convert PHP values ​​into JSON format. However, you may find a lot of problems with PHP to JSON, mostly caused by incorrect formatting, special characters, and escapes in PHP arrays. By cleaning up special characters, removing unnecessary escapes, and ensuring proper formatting of PHP arrays, developers can resolve this issue and be able to run their PHP applications normally.

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