编辑：代码可在此处查看：http://codepad.org/28XT71AB
我已经搜索过，但似乎没有任何东西像我的问题那样出现。
在开始之前：我已将所有可能存在问题的代码放在下面。这是大约200行代码，我非常抱歉！但我完全难过了。
我有一个2D数组，$val由一个函数填充。
然后将数组传递给另一个函数，该函数使用数据填充表。
只有将我的一个功能分成两部分才会出现问题。
我有一个函数，它会获得一堆数据，用它填充2D数组，然后为这些数据创建显示。我决定拆分它 - 一个填充数组的函数，另一个函数以所需的格式显示这些数据。
但是，由于将函数分成两部分，即使仔细分析代码，由于某种原因，数组要么没有正确填充，要么没有正确读取，或者出现其他问题。
包括我的代码转储，因为显然我自己的眼睛无法发现问题。
抱歉，这是很多代码。但是我已经完成了每一行，并且无法解决出错的问题 - 特别是因为当它是一个功能时它工作得很好！
未定义的偏移误差在以下代码中指示的点处循环。
全局变量和第一个功能 - 从CSV中获取数据。
/*
variables that work out current week
*/
$termstart = strtotime("03 October 2011"); //start of term, set manually every year, week 1 is first week after freshers.
$todaysdate = strtotime("now"); //todays date
$weekdif = ceil(($todaysdate-$termstart)/604800);//weeks between the two dates
//define global variables and arrays
$row = 0;
$col = 0;
$num = 0;
//this is the main timetable interface array
$val = array(array());
$ttdata = array();
$lecs = array();
tableinit($weekdif);
function tableinit($wkd)
{
$days = array("Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday");
$times = array("09:00", "10:00", "11:00", "12:00", "13:00", "14:00", "15:00", "16:00", "17:00");
//Check for appropriate CSV file and open it
if (($handle = fopen("timetable.csv", "r")) !== FALSE)
{
//Check file for data and copy it into an array
while (($data = fgetcsv($handle, 1000, ",")) !== FALSE)
{
//filter out blank lines in the file
$fdata = array_filter($data);
$num = count($fdata);
//If line is not empty
if ($num > 0)
{
//for every value in the array (the line)
for ($c=0; $c<$num; $c++)
{
/*
This gets the module code, trims it of useless data,
then adds the name into an array of lectures for comparison later.
This is used to set up different colours for each different module
*/
if ($c == 3)
{
$lecture = substr($fdata[$c],0,8);
if (empty($lecs))
{
$lecs[] = $lecture;
}
else if (!(in_array($lecture,$lecs)))
{
$lecs[] = $lecture;
}
$ttdata[] = $lecture;
}
//if it's the 4th value or higher, then its data we want to display.
if ($c >= 4)
{
//add the data to an array. If no array exists, create it
$ttdata[] = $fdata[$c];
}
/*
if the value is a day of the week
set the value of the first timetable column as the appropriate day
with the corresponding row
*/
switch ($fdata[$c])
{
case $days[0]:
$row = 0;
$val[$row][0] = $fdata[$c];
break;
case $days[1]:
$row = 1;
$val[$row][0] = $fdata[$c];
break;
case $days[2]:
$row = 2;
$val[$row][0] = $fdata[$c];
break;
case $days[3]:
$row = 3;
$val[$row][0] = $fdata[$c];
break;
case $days[4]:
$row = 4;
$val[$row][0] = $fdata[$c];
break;
case $days[5]:
$row = 5;
$val[$row][0] = $fdata[$c];
break;
case $days[6]:
$row = 6;
$val[$row][0] = $fdata[$c];
break;
}
/*
this function compares the current week to the weeks in the timetable.
If there's a match, add a flag to the array for that lecture.
if not, do nothing.
*/
if ($c == 6)
{
$exp1 = explode(",", $fdata[$c]);
foreach ($exp1 as $i)
{
$i = trim($i);
$exp2 = explode("-", $i);
if (($wkd >= $exp2[0])&&($wkd <= $exp2[1]))
{
$ttdata[] = TRUE;
}
}
}
/*
if c the second value in the array,
check the value against the Time array
and set the column appropriately
*/
if ($c==1)
{
switch ($fdata[$c])
{
case $times[0]:
$col = 1;
break;
case $times[1]:
$col = 2;
break;
case $times[2]:
$col = 3;
break;
case $times[3]:
$col = 4;
break;
case $times[4]:
$col = 5;
break;
case $times[5]:
$col = 6;
break;
case $times[6]:
$col = 7;
break;
case $times[7]:
$col = 8;
break;
case $times[8]:
$col = 9;
break;
}
}
} //end line
//fill the timetable with whitespace to preserve shape and empty slots
for ($i=0;$i<=6;$i++)
{
for ($j=1;$j<=9;$j++)
{
if (!isset($val[$i][$j]))
{
$val[$i][$j] = " ";
}
}
}
//if there's a flag to display data
if (isset($ttdata[4]))
{
//remove the flag
unset($ttdata[4]);
//fill the current timetable position with the array of data to display
$val[$row][$col] = $ttdata;
}
//delete the array of data to display
unset($ttdata);
}
}
fclose($handle);//close the file when finished
}
}
第二个功能（绘制表格）
drawtable($weekdif, $val);
function drawtable($wkd, $val)
{
$days = array("Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday");
$times = array("09:00", "10:00", "11:00", "12:00", "13:00", "14:00", "15:00", "16:00", "17:00");
//this sets up any days with no lectures, so there's not just a blank line
for ($m=0;$m<5;$m++)
{
$row=$m;
$val[$row][0] = $days[$m];
}
//create the table for the data from the main array
$table = "<table class='main' align='center'>\n<tr><td>Week $wkd</td>";
//create the line of different lecture times in the first row of the table
foreach ($times as $t)
{
$table .= "<td class='dt'> ". $t . "</td>";
}
$table .= "</tr>\n"; //end first row
//for every weekday
for ($i=0;$i<5;$i++)
{
//create a new row
$table .= "<tr>";
//for every time slot on that day
for ($j=0;$j<=9;$j++)
{
//if there's an array present
if (is_array($val[$i][$j]) == TRUE) //LOOP IS HERE
{
//copy the array to a temporary one
$temp = $val[$i][$j];
/*
Switch statement to ensure that each module is always shown as a different colour.
the same module will always be the same colour. Different modules will always be different colours.
*/
switch ($temp[0])
{
case $lecs[0]:
$table .= "<td class='lecture1'>";
break;
case $lecs[1]:
$table .= "<td class='lecture2'>";
break;
case $lecs[2]:
$table .= "<td class='lecture3'>";
break;
case $lecs[3]:
$table .= "<td class='lecture4'>";
break;
case $lecs[4]:
$table .= "<td class='lecture5'>";
break;
case $lecs[5]:
$table .= "<td class='lecture6'>";
break;
}
//for each value in the array
foreach ($temp as $datum)
{
//print it and create a new line
$table .= " ". $datum . " <br />";
}
$table .= "</td>";
}
//otherwise if a Day is present
elseif ($j==0)
{
//print it
$table .= "<td class='dt'>";
$table .= $val[$i][$j]; //LOOP IS HERE
$table .= "</td>";
}
//otherwise
else
{
//print the whitespace
$table .= "<td class='tt'>";
$table .= $val[$i][$j];
$table .= "</td>";
}
}
//end row
$table .= "</tr>\n";
}
//end table
$table .= "</table>";
//print the entire table
echo $table;
}
最后，要查看错误：
答案 0 :(得分：2)
您需要tableinit使用$val关键字global function tableinit($wkd) {
global $val;
变量访问：
global请参阅PHP关于变量范围的手册页：http://php.net/manual/en/language.variables.scope.php。如果没有$val关键字，您的功能就是创建$val的本地版本并对其进行操作，但您在页面顶部定义的{{1}}保持不变。