如何在到达php中的某一行时写入新文件

Question

我正在尝试编写一个php脚本，它将处理m3u文件的每一行，并将其写入相应的小时文件。每当这个过程开始时，我们总是在午夜00点或12点开始。从第一行到表示END-OF-HOUR的行进入文件$month$day-$hour.58.15.m3u

$month和$day将在整个过程中保持不变，并成功完成。我遇到问题的地方是当我到达下班时间线时。假设发生的是脚本将$hour从00切换到01。前面的0对于小时0-9非常重要。一旦发生切换，它将开始从文件中的下一行写入hour 01文件，直到再次命中小时结束行。小时值再次增加。

这需要持续一天中的所有24小时。

发生的情况是，此脚本将主文件复制到hour 00文件中。

这是我自己能够做到的：

<?php

//$location="";
$file="PLAYLIST";

$month="Nov";
$day="28";
$hour="00";
$outputlocation="Processed";
$outputfile="$month$day-$hour.58.15";


    //Create Playlist Files Code Here and Working//

$handle = fopen("$file.m3u", "r");
if ($handle) {
while (($line = fgets($handle)) !== false) {
    // process the line read.



    //Begin Processing
    //If End Of Hour
        if ($line=="END-OF-HOUR"){

            //If Not 11PM
            if ($hour !=="23"){
                $hour="$hour" + 1;
            }

            //If 11PM
            if ($hour =="24"){
                echo "<script>alert('MusicMaster File Processing Complete')</script>";
            }
        }



    //If Not End Of Hour
    if ($line !="END-OF-HOUR"){
        $ofile=file_get_contents("$outputlocation\\$outputfile.m3u");
        $nfile="$ofile
        $line";
        file_put_contents("$outputlocation\\$outputfile.m3u", "$nfile");

    }


}

fclose($handle);
} else {
// error opening the file.

echo "<script>alert('Error Opening MusicMaster File')</script>";
} 

//https://stackoverflow.com/questions/13246597/how-to-read-a-file-line-by-line-in-php
?>

我不太精通php中的循环。只是非常基本的if语句和mysql查询。

这是它从每个小时中提取并输出到的文件。这只是一个代码片段：

M:\JINGLES\TOH\LEGAL ID 20170416-A.mp3
M:\ITUNES\Music\Danny Gokey\Rise (Album)\02 If You Ain't In It.mp3
M:\ITUNES\Music\MercyMe\MercyMe, It's Christmas\06 Have a Holly Jolly Christmas.mp3
M:\JINGLES\STANDARD\Stay Tuned.mp3
M:\ITUNES\Music\Royal Tailor\Royal Tailor\06 Ready Set Go.mp3
M:\ITUNES\Music\Third Day\Revelation\03 Call My Name.mp3
M:\THE STORY BEHIND IT\Mandisa - Bleed The Same (Song Story).mp3
M:\PROMOTIONS\Valley Park Flea Market & Resale (6PM 5-29).mp3
M:\PROMOTIONS\FoundationLyrics_com.mp3
M:\PROMOTIONS\VinVlogger_com (5-15-17).mp3
END-OF-HOUR
M:\JINGLES\TOH\LEGAL ID 20170816.mp3
M:\ITUNES\Music\Audio Adrenaline\Kings & Queens\02 Kings & Queens.mp3
M:\ITUNES\Music\Stars Go Dim\Stars Go Dim\01 Doxology.mp3
M:\JINGLES\STANDARD\LIN\LIN-002.mp3
M:\ITUNES\Music\NewSong\Newsong\Christian.mp3
M:\ITUNES\Music\David Dunn\Crystal Clear - EP\02 Have Everything.m4a
M:\THE STORY BEHIND IT\Mandisa - Bleed The Same (Song Story).mp3
M:\PROMOTIONS\Valley Park Flea Market & Resale (6PM 5-29).mp3
END-OF-HOUR

我知道我做错了什么，只是不知道是什么。如果您能提供任何帮助，我们将不胜感激。

Answer 1

我会从改变这一点开始。

$outputfile="$month$day-$hour.58.15";  

这需要在while循环迭代时更新(或者至少在更改小时时更新)。

现在，您只需在整个时间内使用为hour 00设置的初始值。

这就是为什么你可以获得它的行为而不改变时间，因为它的值在循环运行时永远不会被重新赋值。

更新

我擅自重写了你的代码。对不起，我是一个完美主义者，我越看越不喜欢。(未测试，因为我没有任何文件)

$file="PLAYLIST";

//Use an array, it's more concise and readable
$date =[
    'month'      => "Nov",
    'day'        => 28,
    'hour'       => 0,
    'minute'     => 58, //added for extendability
    'second'     => 15 //added for extendability
];

$outputlocation="Processed";
/*** Create Playlist Files Code Here and Working ***/

//open file. We can't proceed without the file, might as well stop here if we can't open it.
if(false === ($handle = fopen("$file.m3u", "r"))) die("Failed to open file.");

//while each line in the file
while (($line = fgets($handle)) !== false) {  
    if(trim(strtoupper($line)) =="END-OF-HOUR"){//If $line = End Of Hour

       //trim removes whitespace from front and back, strtoupper should be self explanitory

       if($hour < 24 ){
            //if less the 12pm (and $line = 'END-OF-HOUR' ) 
            //increment hour and left pad.
             //you may need to use < 23 your logic forgot about it.

            ++$date['hour'];
        }else{
            //else if 12pm (and $line = 'END-OF-HOUR' ) 
            echo "<script>alert('MusicMaster File Processing Complete')</script>";
        }
        continue; 
        /*  
           goes to next line ( iteration of the loop )
           none of the code below this runs.
           logically this is essentially what you had ^
           so there is no need to continue
        */
    }

    // 0 pad left any parts that are len of 1 lenght  
    $fixed = array_map(function($i){
        return (strlen($i) == 1) ? "0$i":$i;
    }, $date);

    /*
      create the filename just before we use it
      not that it matter in PHP, but the original array stays as INT's
      the month is strlen() = 3, so it's unchanged by the above.
     */
    $outputfile = $fixed['month'].$fixed['day'].'-'.$fixed['hour'].'.'.$fixed['minute'].'.'.$fixed['second'];

    //this is all you..
    $ofile=file_get_contents("$outputlocation\\$outputfile.m3u");
    $nfile="$ofile
    $line";
    file_put_contents("$outputlocation\\$outputfile.m3u", "$nfile");

 } //end while

我用这个测试了一些东西：

$date =[
    'month'      => "Nov",
    'day'        => 28,
    'hour'       => 0,
    'minute'     => 58, //added for extendability
    'second'     => 15 //added for extendability
];

$fixed = array_map(function($i){
    return (strlen($i) == 1) ? "0$i":$i;
}, $date);

$outputfile = $fixed['month'].$fixed['day'].'-'.$fixed['hour'].'.'.$fixed['minute'].'.'.$fixed['second'];


print_r($fixed);

echo "\n$outputfile\n";

输出

Array
(
    [month] => Nov
    [day] => 28
    [hour] => 00
    [minute] => 58
    [second] => 15
)

Nov28-00.58.15

您可以在此sandbox中尝试

更新

如果你不想修剪所有的行，那么就把这行分开

while (($line = fgets($handle)) !== false) {  
    if(trim(strtoupper($line)) =="END-OF-HOUR"){//If $line = End Of Hour

像这样

while (($line = fgets($handle)) !== false) {  
    $line = trim($line);
    if(strtoupper($line) =="END-OF-HOUR"){//If $line = End Of Hour

关于trim的其他一些事情，

通过设置第二个参数，trim('**foo**', '*'); //outputs 'foo'

• you可以设置要修剪的字符，例如trim('abcFOOcba', 'abc'); //outputs 'FOO'

• you可以设置多个字符，但它的行为类似于OR，无论顺序如何，都会替换每个字符。例如，ltrim(' Foo '); //outputs 'Foo '

可以用rtrim(' Foo '); //outputs ' Foo'修剪右侧，也可以用

• 修剪左侧

我不知道为什么他们有三个独立的函数，我更喜欢这个标志是TRIM_RIGH，TRIM_LEFT，TRIM_BOTH的trim($string, $match, $flag);，但是，我猜你不能得到你想要的一切。(类似于MySql版本)

通过使用array_map，可以非常容易地将数组裁剪为空白

 $a = [ 'Foo  ', '  Bar  '];

 $a = array_map('trim', $a);
 print_r($a);  //outputs  ['Foo', 'Bar']

PHP Trim文档

MySQL也可以作为TRIM()函数的SELECT TRIM(BOTH ' ' FROM column) AS foo，它们非常有用。

Mysql Trim文档