Question

背景：我试图了解以下情况的实际发生情况。

我正在使用colorbox.js灯箱脚本，并且当用户单击任何表行中的<a class='ajax' href='edit_labor.php?edit_id=$id' title=''><span class='oi oi-pencil'>Edit</span></a>链接时，灯箱应弹出，并且php页面（位于服务器上）应装入灯箱内。

发生这种情况，但是子PHP页面edit_labor.php无法访问在父页面planned_labot.php上设置的任何变量。仅为了测试子页面的范围，我实际上能够在子页面和父页面的页眉中都添加一个include('functions.php');。尝试两次加载相同的函数是否应该不会出错？

问题：当jquery.colorbox.js加载该页面时，我不了解所加载的php页面与父php页面之间的父子关系。

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
   
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery.colorbox/1.6.4/jquery.colorbox-min.js"></script>

<script>
			$(document).ready(function(){
				$(".ajax").colorbox();				
				//Example of preserving a JavaScript event for inline calls.
				});
		</script>

/*
    Colorbox Core Style:
    The following CSS is consistent between example themes and should not be altered.
*/
#colorbox, #cboxOverlay, #cboxWrapper{position:absolute; top:0; left:0; z-index:9999; overflow:hidden; -webkit-transform: translate3d(0,0,0);}
#cboxWrapper {max-width:none;}
#cboxOverlay{position:fixed; width:100%; height:100%;}
#cboxMiddleLeft, #cboxBottomLeft{clear:left;}
#cboxContent{position:relative;}
#cboxLoadedContent{overflow:auto; -webkit-overflow-scrolling: touch;}
#cboxTitle{margin:0;}
#cboxLoadingOverlay, #cboxLoadingGraphic{position:absolute; top:0; left:0; width:100%; height:100%;}
#cboxPrevious, #cboxNext, #cboxClose, #cboxSlideshow{cursor:pointer;}
.cboxPhoto{float:left; margin:auto; border:0; display:block; max-width:none; -ms-interpolation-mode:bicubic;}
.cboxIframe{width:100%; height:100%; display:block; border:0; padding:0; margin:0;}
#colorbox, #cboxContent, #cboxLoadedContent{box-sizing:content-box; -moz-box-sizing:content-box; -webkit-box-sizing:content-box;}

/* 
    User Style:
    Change the following styles to modify the appearance of Colorbox.  They are
    ordered & tabbed in a way that represents the nesting of the generated HTML.
*/
#cboxOverlay{background:url(images/overlay.png) repeat 0 0; opacity: 0.9; filter: alpha(opacity = 90);}
#colorbox{outline:0;}
    #cboxTopLeft{width:21px; height:21px; background:url(images/controls.png) no-repeat -101px 0;}
    #cboxTopRight{width:21px; height:21px; background:url(images/controls.png) no-repeat -130px 0;}
    #cboxBottomLeft{width:21px; height:21px; background:url(images/controls.png) no-repeat -101px -29px;}
    #cboxBottomRight{width:21px; height:21px; background:url(images/controls.png) no-repeat -130px -29px;}
    #cboxMiddleLeft{width:21px; background:url(images/controls.png) left top repeat-y;}
    #cboxMiddleRight{width:21px; background:url(images/controls.png) right top repeat-y;}
    #cboxTopCenter{height:21px; background:url(images/border.png) 0 0 repeat-x;}
    #cboxBottomCenter{height:21px; background:url(images/border.png) 0 -29px repeat-x;}
    #cboxContent{background:#fff; overflow:hidden;}
        .cboxIframe{background:#fff;}
        #cboxError{padding:50px; border:1px solid #ccc;}
        #cboxLoadedContent{margin-bottom:28px;}
        #cboxTitle{position:absolute; bottom:4px; left:0; text-align:center; width:100%; color:#949494;}
        #cboxCurrent{position:absolute; bottom:4px; left:58px; color:#949494;}
        #cboxLoadingOverlay{background:url(images/loading_background.png) no-repeat center center;}
        #cboxLoadingGraphic{background:url(images/loading.gif) no-repeat center center;}

        /* these elements are buttons, and may need to have additional styles reset to avoid unwanted base styles */
        #cboxPrevious, #cboxNext, #cboxSlideshow, #cboxClose {border:0; padding:0; margin:0; overflow:visible; width:auto; background:none; }
        
        /* avoid outlines on :active (mouseclick), but preserve outlines on :focus (tabbed navigating) */
        #cboxPrevious:active, #cboxNext:active, #cboxSlideshow:active, #cboxClose:active {outline:0;}

        #cboxSlideshow{position:absolute; bottom:4px; right:30px; color:#0092ef;}
        #cboxPrevious{position:absolute; bottom:0; left:0; background:url(images/controls.png) no-repeat -75px 0; width:25px; height:25px; text-indent:-9999px;}
        #cboxPrevious:hover{background-position:-75px -25px;}
        #cboxNext{position:absolute; bottom:0; left:27px; background:url(images/controls.png) no-repeat -50px 0; width:25px; height:25px; text-indent:-9999px;}
        #cboxNext:hover{background-position:-50px -25px;}
        #cboxClose{position:absolute; bottom:0; right:0; background:url(images/controls.png) no-repeat -25px 0; width:25px; height:25px; text-indent:-9999px;}
        #cboxClose:hover{background-position:-25px -25px;}

/*
  The following fixes a problem where IE7 and IE8 replace a PNG's alpha transparency with a black fill
  when an alpha filter (opacity change) is set on the element or ancestor element.  This style is not applied to or needed in IE9.
  See: http://jacklmoore.com/notes/ie-transparency-problems/
*/
.cboxIE #cboxTopLeft,
.cboxIE #cboxTopCenter,
.cboxIE #cboxTopRight,
.cboxIE #cboxBottomLeft,
.cboxIE #cboxBottomCenter,
.cboxIE #cboxBottomRight,
.cboxIE #cboxMiddleLeft,
.cboxIE #cboxMiddleRight {
    filter: progid:DXImageTransform.Microsoft.gradient(startColorstr=#00FFFFFF,endColorstr=#00FFFFFF);
}

<?PHP
//I am also including this same file in edit_labot.php
include('functions.php');

//
$test_var_parent = "this is a test string that is undefined in edit_labor.php";

?>

<a class='ajax' href='edit_labor.php?edit_id=1' title=''><span class='oi oi-pencil'>Edit</span></a>

上面是代码和edit_labor.php在加载时尝试引用$test_var_parent，但我得到了未定义的通知

Answer 1

PHP变量仅在服务器正在处理中时才有意义，以便生成所需的HTML。

很明显，父页面在第一个PHP进程之后被加载到浏览器，子页面在第二个PHP进程之后被加载到浏览器。变量之间不能进行任何交叉访问，因为该过程是分别进行的，并且在两个不同的时间点。

如果您的子页面要访问父页面生成的信息，请让父页面生成信息并将其存储在全局js变量中。加载子页面后，其js现在可以访问由父页面生成的全局变量。

以下问题显示了另一种方法。这取决于您在页面之间共享信息时应使用哪种方法。

How to pass variables between php scripts?

载入PHP页面的JavaScript灯箱

1 个答案: