How to Send Large Arrays to a PHP Script via Ajax?

Sending Array to PHP Script via Ajax

When dealing with large array data, transferring it to a PHP script through Ajax requires careful consideration.

Best Practice: JSON Encoding

To handle large arrays efficiently, it is recommended to encode the data into JSON (JavaScript Object Notation). JSON provides a structured and compact representation that is easily parsable by both JavaScript and PHP.

Ajax Request

The updated Ajax request would then appear as follows:

dataString = ??? ; // array?
var jsonString = JSON.stringify(dataString);
$.ajax({
    type: "POST",
    url: "script.php",
    data: {data: jsonString},
    cache: false,
    success: function(){
        alert("OK");
    }
});

PHP Script

In the PHP script, the data can be decoded using json_decode as follows:

$data = json_decode(stripslashes($_POST['data']));
foreach($data as $d){
    echo $d;
}

Additional Notes

• When sending data via POST, it must be formatted as a key-value pair.
• The data key is used to represent the JSON-encoded array.
• Stripping slashes (using stripslashes()) is necessary to remove any unnecessary backslashes added by PHP's POST data handling.

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