About PHP http message settings CURLOPT_HTTPHEADER

The trap set by PHP CURLOPT_HTTPHEADER

No more nonsense, just go to the code

//省略。。。
curl_setopt($ci, CURLOPT_HTTPHEADER, $headers);
//省略。。。

us The $headers are usually written like this

//错误示范 二维数组
$headers = [
    "Content-Type"     => "application/json",
    "X-Requested-With" => "XMLHttpRequest",
];
//正确写法
$headers = [
    "Content-Type:application/json",
    "X-Requested-With:XMLHttpRequest",
];

I was stuck by this small problem for more than 2 hours. I hope it can help friends who use PHP cURL to troubleshoot

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