想到我在PHP v5.3.3-1ubuntu9.5 CLI中发现了一个错误？

我可能发现了一个错误，如果是这样的话，我该如何报告呢？想到我在PHP v5.3.3-1ubuntu9.5 CLI中发现了一个错误？

这里是我的本钱：

for ($i = 0; $i <= ($count)-1; ++$i) { 
Lots of code...more then I want to put here 
.... 
..... 
..... 
$mailto = $mailto . $i +1 . ") " . $name . " " . $location . " Type: " . $type . " Status: " . $geostatus . " Difficulty " .$difficulty . "\n" . $region . "\nHidden: " . $hidden . " Last Update: " . $lastupdate . " Last Found: " . $lastfound . "\nDistance: $distance Bearing: $bearing degrees $direction\n\n"; 
} 

echo "$mailto \n";

输出将是这样的：

4) Morrow Parking - RR Relic LMBT Lat: 39.35455 Lon: -84.133733 Type: Traditional Cache Status: Active Difficulty 3 
City/State: Morrow, OH Warren Co. 
Hidden: Wed June 09 2010 04:00 Last Update: Wed August 03 2011 17:43 Last Found: Wed December 31 1970 19:00 
Distance: 4.31 Bearing: 212 degrees SW

显示我只有在列表中的最后一项。但是，如果我只是稍微改变代码如下：

for ($i = 0; $i <= ($count)-1; ++$i) { 
Lots of code...more then I want to put here 
.... 
..... 
..... 
$cc = $i +1; 
$mailto = $mailto . $cc . ") " . $name . " " . $location . " Type: " . $type . " Status: " . $geostatus . " Difficulty " .$difficulty . "\n" . $region . "\nHidden: " . $hidden . " Last Update: " . $lastupdate . " Last Found: " . $lastfound . "\nDistance: $distance Bearing: $bearing degrees $direction\n\n"; 
} 

echo "$mailto \n";

我得到充分的输出，因为我希望看到：

1) Uranus - The Solar System - Lil Miami Bike Trail Lat: 39.415517 Lon: -84.103383 Type: Traditional Cache Status: Active Difficulty 1.5 
City/State: , OH Warren Co. 
Hidden: Sun October 17 2010 04:00 Last Update: Fri August 05 2011 18:25 Last Found: Wed December 31 1970 19:00 
Distance: 0.92 Bearing: 309 degrees NW 

2) 79 Lat: 39.394517 Lon: -84.096533 Type: Traditional Cache Status: Active Difficulty 2 
City/State: , OH Warren Co. 
Hidden: Sun May 30 2010 04:00 Last Update: Wed August 03 2011 17:42 Last Found: Wed December 31 1970 19:00 
Distance: 0.93 Bearing: 201 degrees S 

3) RR Relic - Oregonia Lat: 39.462583 Lon: -84.100383 Type: Traditional Cache Status: Active Difficulty 1.5 
City/State: Oregonia, OH Warren Co. 
Hidden: Sun May 02 2010 04:00 Last Update: Wed August 03 2011 17:41 Last Found: Wed December 31 1970 19:00 
Distance: 3.88 Bearing: 351 degrees N 

4) Morrow Parking - RR Relic LMBT Lat: 39.35455 Lon: -84.133733 Type: Traditional Cache Status: Active Difficulty 3 
City/State: Morrow, OH Warren Co. 
Hidden: Wed June 09 2010 04:00 Last Update: Wed August 03 2011 17:43 Last Found: Wed December 31 1970 19:00 
Distance: 4.31 Bearing: 212 degrees SW

我有没有发现一个bug，还是我做错事的第一种方式，并在第二种方式更正？

如果我确实发现了一个错误，我该如何报告。

PHP v5.3.3在Ubuntu 10.10上运行CLI版本谢谢。

来源

2011-09-07 user895468

听起来微不足道......但你试过'$ mailto。（$ i + 1）。＃ – rlemon

在代码的第一位，更改：

$mailto = $mailto . $i +1 . ") " . $name . " " . $location . " Type: " . $type . " Status: " . $geostatus . " Difficulty " .$difficulty . "\n" . $region . "\nHidden: " . $hidden . " Last Update: " . $lastupdate . " Last Found: " . $lastfound . "\nDistance: $distance Bearing: $bearing degrees $direction\n\n";

到

$mailto = $mailto . ($i +1) . ") " . $name . " " . $location . " Type: " . $type . " Status: " . $geostatus . " Difficulty " .$difficulty . "\n" . $region . "\nHidden: " . $hidden . " Last Update: " . $lastupdate . " Last Found: " . $lastfound . "\nDistance: $distance Bearing: $bearing degrees $direction\n\n";

我怀疑你刚刚的操作错误的顺序。

来源

2011-09-07 18:46:04 ceejayoz

具体来说，将一个字符串和一个整数'（$ mailto。$ i）连接起来，但可能不是你的意图。但是，添加一个非数字字符串和一个整数将字符串视为0. –

好的，这确实给了我期望看到的输出。谢谢你......节省一点额外的东西！ :-)所以我的下一个问题是它不会仍然是一个错误，因为$ i是我的循环计数器 - – user895468

不，这不是一个错误，只是你忘记了操作顺序和类型转换。你在做'$ mailto。 $ i'，然后加1。当你为一个字符串添加一个int时，在它被添加到'$ i'之前，字符串被转换为一个int（零）。这就是为什么当你看到'$ i'的结果是4时，你已经把所有前面的输出变成了'0'。 – ceejayoz

它与运算符优先级有关。这里有一个简单的例子：

$i=1;// doesn't matter what this value is 
$s = " alpha " . $i+1 . " beta " . " gamma<br>\n"; 
echo $s; // 1 beta gamma 

$s = " alpha " . ($i+1) . " beta " . " gamma<br>\n"; 
echo $s; // alpha 2 beta gamma

在第一种情况下的异常行为，甚至发生，如果你的猫加入到（INT）。

$s = " alpha " . (int)$i+1 . " beta " . " gamma<br>\n";

来源

2011-09-07 18:55:23 Charlie

感谢所有的信息，我的妻子在数学课，她总是问我操作的顺序，我猜我应该学会倾听自己。好吧，我没有发现错误，不好，我只是不知道我在做什么...感谢您的帮助。 – user895468

不错的简单例子。 +1 – ceejayoz

想到我在PHP v5.3.3-1ubuntu9.5 CLI中发现了一个错误？

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