Question

我正在尝试从数据库中获取值，好像我正在正确地获取它，但是在执行时它不起作用。它显示空白页，请指导，因为我是PHP MySql的新手

<html>
<body onload="motionjpeg('motionjpeg');">
    <h1>ipCam</h1>
    <img id="motionjpeg" src="http://127.0.0.1:8000/videoCV" />
</body>

</html>
<script>
    function motionjpeg(id) {
        var image = document.getElementById(id), src;

        if (!image.length) return;

        src = image.src
        if (src.indexOf("?") < 0) {
            image.src = src + "?"; // must have querystring
        }

        image.on("load", function() {
            this.src = this.src.replace(/\?[^\n]*$/, "?") +
                (new Date()).getTime(); // 'this' refers to the image
        });
    }   
</script>

Answer 1

请查看您服务器的php.ini配置，以检查错误报告是否设置为某些内容。某些服务器隐藏了严重错误，以避免向黑客提供有关服务器缺陷的提示。

; error_reporting
;   Default Value: E_ALL & ~E_NOTICE & ~E_STRICT & ~E_DEPRECATED
;   Development Value: E_ALL
;   Production Value: E_ALL & ~E_DEPRECATED & ~E_STRICT
error_reporting = E_ALL

更多信息：

; Error Level Constants:
; E_ALL             - All errors and warnings (includes E_STRICT as of PHP 5.4.0)
; E_ERROR           - fatal run-time errors
; E_RECOVERABLE_ERROR  - almost fatal run-time errors
; E_WARNING         - run-time warnings (non-fatal errors)
; E_PARSE           - compile-time parse errors
; E_NOTICE          - run-time notices (these are warnings which often result
;                     from a bug in your code, but it's possible that it was
;                     intentional (e.g., using an uninitialized variable and
;                     relying on the fact it's automatically initialized to an
;                     empty string)
; E_STRICT          - run-time notices, enable to have PHP suggest changes
;                     to your code which will ensure the best interoperability
;                     and forward compatibility of your code
; E_CORE_ERROR      - fatal errors that occur during PHP's initial startup
; E_CORE_WARNING    - warnings (non-fatal errors) that occur during PHP's
;                     initial startup
; E_COMPILE_ERROR   - fatal compile-time errors
; E_COMPILE_WARNING - compile-time warnings (non-fatal errors)
; E_USER_ERROR      - user-generated error message
; E_USER_WARNING    - user-generated warning message
; E_USER_NOTICE     - user-generated notice message
; E_DEPRECATED      - warn about code that will not work in future versions
;                     of PHP
; E_USER_DEPRECATED - user-generated deprecation warnings

正如@Strawberry在评论中所说，调用不推荐使用的mysql*函数时，您可能会遇到致命错误。改用mysqli*（并激活PHP的mysqli扩展名）

执行代码后显示空白页

1 个答案: