在WordPress中，作者遇到一个AJAX回调函数的问题。他们在functions.php文件中添加了send_email_callback函数来处理发送邮件，并通过wp_ajax_和wp_ajax_nopriv_钩子注册。然而，当回调函数返回JSON响应时，JavaScript收到的响应中包含了一个额外的'0'。问题源于admin-ajax.php文件中默认的'die('0')';这导致了JSON解析错误。作者探讨了解决方案，包括修改admin-ajax.php或在send_email_callback函数末尾直接使用'die()'。
I added the following to my functions.php file:
add_action('wp_ajax_send_email', 'send_email_callback');
add_action('wp_ajax_nopriv_send_email', 'send_email_callback');
So i added the following callback function:
send_email_callback()
{
//do some processing
echo json_encode(array('response'=>'Ya man it worked.'));
//return control back to *-ajax.php
}
This is what is returned to my javascript :
{"response":"Ya man it worked."}0
So ofcourse when it reaches the $.parseJSON( msg ) line I get Uncaught SyntaxError: Unexpected number.
var request = $.ajax({
url: "/wp-admin/admin-ajax.php",
method: "POST",
data: { action : 'send_email', P : container },
dataType: "html"
});
request.done(function( msg ) {
var obj = $.parseJSON( msg );
console.log(obj.response);
});
request.fail(function( jqXHR, textStatus ) {
alert( "Request failed: " + textStatus );
});
});
So where does this 0 come from? admin-ajax.php
it says on line 97:
// Default status
die( '0' );
Why is this here, why am I reaching the die('0') line? Shouldnt it be just die() so it doesnt mess up my response?
Seems the only way to fix this is either modify admin-ajax.php or simply die() at the end of my send_email_callback() function.
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