Hii我正在尝试使用javascript、AJAX和php将表单数据保存到用户元数据表中。这是我的密码

HTML表单：

    <form id="savem" method="post">

    <input type="text" name="profile_name" id="profile_name"/>

    <input type="text" name="value1" id="value1"/>

    <input type="text" name="value2" id="value2"/>

    <input type="submit" value="save"/>

    </form>

将脚本排入函数队列。php

    function save_measurment() {

$theme_url  = get_template_directory_uri();     // Used to keep our Template Directory URL
$ajax_url   = admin_url( \'admin-ajax.php\' );        // Localized AJAX URL

// Register Our Script for Localization
wp_register_script(
    \'measurment\',                             // Our Custom Handle
    "{$theme_url}/assets/js/measurment.js",  // Script URL, this script is located for me in `theme-name/scripts/um-modifications.js`
    array( \'jquery\' ),                              // Dependant Array
    \'1.0\',                                          // Script Version ( Arbitrary )
    true                                            // Enqueue in Footer
);

// Localize Our Script so we can use `ajax_url`
wp_localize_script(
    \'measurment\',
    \'ajax_url\',
    $ajax_url
);

// Finally enqueue our script
wp_enqueue_script( \'measurment\' );
    }
    add_action( \'wp_enqueue_scripts\', \'save_measurment\' );

处理元值的Javascript函数：

    jQuery( \'document\' ).ready( function( $ ) {

// Form submission listener
$( \'#savem\' ).submit( function() {
    var measrumentData = {};
    // Grab our post meta value
     measrumentData.profile_name = $( \'#savem #profile_name\' ).val();
     measrumentData.value1 = $(\' #savem #value1\').val();
    measrumentData.value2 = $(\' #savem #value2\').val();

    var jsonString = JSON.stringify(measrumentData);

    // Do very simple value validation

        $.ajax( {
            url : ajax_url,                 // Use our localized variable that holds the AJAX URL
            type: \'POST\',                   // Declare our ajax submission method ( GET or POST )
            data:  {data: jsonString},
        } )
        .success( function( results ) {
            console.log( \'User Meta Updated!\' );
        } )
        .fail( function( data ) {
            console.log( data.responseText );
            console.log( \'Request failed: \' + data.statusText );
        } );


    return false;   // Stop our form from submitting
} );
  } );

最后是ajax回调函数

    function measurment_callback() {

// Ensure we have the data we need to continue
if( ! isset( $_POST ) || empty( $_POST ) || ! is_user_logged_in() ) {

    // If we don\'t - return custom error message and exit
    header( \'HTTP/1.1 400 Empty POST Values\' );
    echo \'Could Not Verify POST Values.\';
    exit;
}

$user_id = get_current_user_id();            // Get our current user ID
$data = json_decode(stripslashes($_POST[\'data\']));

foreach($data as $key=>$value)
{
   add_user_meta( $user_id, $key, $value ); 
}

exit;
   }

现在发生的事情是，在提交表单时，控制台显示更新的元数据，但phpmyadmin给出错误消息“null不是对象（正在计算‘field\\u id.match（/[^-]+$/）’）”。我不知道怎么了，所以任何帮助都是值得的

var measrumentData = {
    profile_name:null,
    value_one:null,
    value_two:null

};
// Grab our post meta value
measrumentData.profile_name = $( \'#savem #profile_name\' ).val();
measrumentData.value_one = $(\' #savem #value1\').val();
measrumentData.value_two = $(\' #savem #value2\').val();

var measrumentData = {};
// Grab our post meta value
 measrumentData[\'profile_name\'] = $( \'#savem #profile_name\' ).val();
 measrumentData[\'value1\'] = $(\' #savem #value1\').val();
measrumentData[\'value2\'] = $(\' #savem #value2\').val();