我得到一个无限循环。我相信我在同一行输入中读了很多遍，而不是去读下一行。从我能想到的，我需要另一段代码，就在while循环的末尾，移动到下一段。我需要用strtok来做这个，我的问题是怎么做?
必须使用FOREACH循环，不能使用explosion/IMPLODE。
包含的文件是bbs_2013invent.php，读取为:
<?php
$data =
"Sunscreen_SPF-55 BB-ss1 S 9.98 83 828.34 4.99 NA
Sunscreen_SPF-7000 BB-ss2 S 29.98 9 269.82 19 NA
SunHat-F BB-sh3 S 33.79 41 1385.39 25.5 NA
SunHat-M BB-sh8 S 41.79 18 752.22 29.5 NA
Sandals BB-sd4 S 19.38 32 620.16 4.75 NA
Towel-Large BB-tl S 45 57 2565.00 29.99 NA
Towel-Indiv BB-ts S 11.75 133 1562.75 5.9 NA
Beach_Chair BB-bc2 S 67.5 19 1282.50 47.5 NA
Umbrella BB-umb R 129 18 2322 398 0.4
Surfboard BB-surf2 R 135 27 3645 735 0.2
JetSki BB-jsk7 R 160.25 38 6089.50 18795.00 0.4
Outlaw20_Powerboat BB-pb20 R 298 11 3278 67850.00 0.3";
?>
剩下的代码如下:
<?PHP
//Imports a file
include 'bbs_2013invent.php';
//variable
$delimiters = "'n";
//Declare and fill array
$product = ['name' => rtrim(strtok($data, $delimiters)),
'serial' => rtrim(strtok($delimiters)),
'status' => rtrim(strtok($delimiters)),
'price' => rtrim(strtok($delimiters)),
'units' => rtrim(strtok($delimiters)),
'revenue' => rtrim(strtok($delimiters)),
'cost' => rtrim(strtok($delimiters)),
'factor' => rtrim(strtok($delimiters)),
];
//Column headers
printf("PRODUCT 'tSERIAL# 'tPRICE/RENTALCHG 'tUNITS/DAYS 'tREVENUE 'tORIGCOST 'tNOTES");
//while loop
while(['name'])
{
//Calculates the total days rented and revenue respectively
$totalDays += $units;
$totalRevenue += $revenue;
if ($key == 'status' && $value = S && "units" <800)
{
printf("'t L");
}
if ($key == 'status' && $value = R && "units" <20)
{
printf("'t LR");
}
//foreach loop
foreach($product as $key => $value)
{
printf($key, $value);
}
} //end of while loop
//displays the total number of days items have been rented
printf($totalDays);
//displays the total revenue of all products combined
printf($totalRevenue);
?>
这会导致无限循环:
while(['name']){ ... }
这个循环一直运行，直到['name']计算为FALSE，这永远不会发生。
一个可能的解决方案…
<?PHP
//Imports a file
include 'data.php';
//variable
$delimiters = " 'n";
$totalDays = $totalRevenue = 0.0;
//Declare and fill array
$name = rtrim(strtok($data, $delimiters));
$spaces = ['name' => "-20",
'serial' => "-10",
'status' => "-6",
'price' => "10",
'units' => "10",
'revenue' => "15",
'cost' => "15",
'factor' => "8"
];
//Column headers
printf("PRODUCT't't SERIAL#'t PRICE/RENTALCHG UNITS/DAYS'tREVENUE't'tORIGCOST NOTES'n");
//while loop
while($name)
{
$product = ['name' => $name,
'serial' => rtrim(strtok($delimiters)),
'status' => rtrim(strtok($delimiters)),
'price' => rtrim(strtok($delimiters)),
'units' => rtrim(strtok($delimiters)),
'revenue' => rtrim(strtok($delimiters)),
'cost' => rtrim(strtok($delimiters)),
'factor' => rtrim(strtok($delimiters)),
];
//Calculates the total days rented and revenue respectively
$totalDays += $product["units"];
$totalRevenue += $product["revenue"];
//foreach loop
foreach($product as $key => $value)
{
if ($key == 'status' && $value = "S" && "units" <800)
{
printf("%${spaces[$key]}s","L");
} else if ($key == 'status' && $value = "R" && "units" <20)
{
printf("%${spaces[$key]}s","LR");
} else {
printf("%${spaces[$key]}s", $value);
}
}
print "'n";
$name = rtrim(strtok($delimiters));
} //end of while loop
//displays the total number of days items have been rented
printf("'n%10.02f", $totalDays);
//displays the total revenue of all products combined
printf("'n%10.02f", $totalRevenue);
?>
更改条件以计算名称值。
分隔符也是空白符来读取不同的字段，它也必须在while结束时读取。
输出格式，瞧…