爲什麼這個通知（12次）：未初始化字符串偏移量：0 app_vsf.php上線90

Question

請幫我關於在標題中指明的問題。

的代碼部分是：

<?php 
// framework related things in this file. 

// vsf = Very Simple Framework 

$vsf = new stdClass; 

// default app_layout file 
$vsf->app_layout = 'app_layout.php'; 

// define the 'index' file, where we should link back to. 
// Need to include the path, otherwise S.E. friendly URLS get messed up. 
$vsf->self = '/mapcal/index.php'; 

// to support search engine friendly URLS, grab data from PATH_INFO 
if (isset($_SERVER["PATH_INFO"])) { 
$tmp_array = explode("/",$_SERVER["PATH_INFO"]); 

for ($index = 0; $index < count($tmp_array); $index++) { 
// only want the odd elements, they are the parameters. The even ones are the values 
if ($index % 2 == 0) { continue; } 
$_REQUEST[$tmp_array[$index]] = $tmp_array[$index+1]; 
} 
} 

// these functions are for form error handling 
$errorfields = array(); 

$errormsgs = array(); 

$errorwasthrown = FALSE; 

function adderrmsg($field = '', $msg = '') { 
global $errorfields; 
global $errormsgs; 
global $errorwasthrown; 

if ($field) { 
$errorfields[] = $field; 
} 
if ($msg) { 
$errormsgs[] = $msg; 
} 
$errorwasthrown = TRUE; 
} 

function displayformerrors($errhdr = 'The following errors occured:') { 
global $errorfields; 
global $errormsgs; 

if (empty($errorfields) and empty($errormsgs)) {return;} 

if (! empty($errormsgs)) { 
print "<p style='color: red;'>$errhdr<br>\n"; 

foreach ($errormsgs as $msg) { 
    print "&#8226; $msg<br>\n"; 
    } 
print "</p>\n\n"; 
} 
} 

function displayformlabel ($field = '', $label = '') { 
global $errorfields; 
if (in_array($field,$errorfields)) { 
print "<span style='color: red;'>$label</span>"; 
} 
else { 
print $label; 
} 
} 

function reuseform($formaction = 'new',$field_list = '',$query = '') { 
if ($formaction == "new") { 
foreach (split(",",$field_list) as $field) { 
    global ${$field}; 
    ${$field} = ''; 
    } 
} 
elseif ($formaction == 'form') { 
foreach (split(",",$field_list) as $field) { 
    global ${$field}; 
    ${$field} = $_REQUEST[$field]; 
    } 
} 

elseif ($formaction == 'query') { 
foreach (split(",",$field_list) as $field) { 
    global ${$field}; 
    ${$field} = $query[$field]; 
    } 
} 

} // close function reuseform 

?> 

線無90是：$ {$字段} = $查詢[$字段];

通知正在顯示12倍，因爲有在形式12個字段，但爲什麼這是顯示，我無法看到在表單字段中的數據進行編輯的目的。 請幫我解決這個問題。

Answer 1

檢查以確保$ _REQUEST持有變量。

此外，reuseform似乎默認設置$查詢爲''而不是Array（）...是$查詢是否正確設置？這個錯誤表明它不是。

Answer 2

顯然${$field}評估爲"0"和$query["0"]未定義。

Answer 3

你可以使用這個快速修復與isset

if(isset($GLOBALS[${$field}])) 
{ 
    ${$field} = $query [$field]; 
}