Question

我有一个循环播放音乐曲目的数组，但是我需要从数组的最后一个元素中删除逗号，有人可以帮忙吗？

<?php foreach ($bucket_contents as $file){ $fname = $file['name']; $furl = "http://".$isdHtml5Bucket.".s3.amazonaws.com/".urlencode($fname);

if(preg_match("/\.mp3$/i", $furl)) { ?>
    {
            name:"<?php echo basename($fname); ?>",
            mp3:"<?php echo $furl; ?>"

        },
<?php }else{ ?>
        {
            name:"<?php echo basename($fname); ?>",
            m4a:"<?php echo $furl; ?>"

        },<?php } } ?>

这是数组的输出。

    {
        name:"bassline",
        m4a:"http://suyssamuelarawaeast.s3.amazonaws.com/warehouse%2Fbassline%2F"

    },
    {
        name:"Project Bassline - Drop The Pressure (Jack Beats Rinsed Out Remix).mp3",
        mp3:"http://suyssamuelarawaeast.s3.amazonaws.com/warehouse%2Fbassline%2FProject+Bassline+-+Drop+The+Pressure+%28Jack+Beats+Rinsed+Out+Remix%29.mp3"

    },
        {
        name:"deadmau5 vs jelo   the reward is cheese.mp3",
        mp3:"http://suyssamuelarawaeast.s3.amazonaws.com/warehouse%2Fdeadmau5+vs+jelo+++the+reward+is+cheese.mp3"

    },
    {
        name:"vocal",
        m4a:"http://suyssamuelarawaeast.s3.amazonaws.com/warehouse%2Fvocal%2F"

    },      
            {
        name:"Thin Ice",
        free:true,
        mp3:"http://www.jplayer.org/audio/mp3/Miaow-10-Thin-ice.mp3",
        oga:"http://www.jplayer.org/audio/ogg/Miaow-10-Thin-ice.ogg"
    },

如果滚动到数组的最后一个元素，则可以看到输出的逗号。我真的需要从数组的最后一个元素中删除这个逗号。

由于

Answer 1

将您的字符串传递给rtrim()，并将charlist中的逗号指定为可移动字符：

$str = rtrim($str, ',');

修改

或......也许这种方法（未经测试）：

$songs = array(); foreach ($bucket_contents as $file) { $fname = $file['name']; $furl = "http://".$isdHtml5Bucket.".s3.amazonaws.com/".urlencode($fname); $type = preg_match("/\.mp3$/i", $furl) ? 'mp3' : 'm4a'; $songs[] = sprintf('{ name: %s, %s: %s }', $fname, $type, $furi); } echo implode(',', $songs);

Answer 2

修改：清理代码。这个不使用临时数组，就像其他答案一样。

我没有看到该代码如何产生该输出，因为他的最终输出块中包含您不打印的字段。除此之外，这样的事情可能就是你想要的（未经测试）：

<?php

$comma = '';
foreach ($bucket_contents as $file) {
  $fname = $file['name'];
  $furl = "http://".$isdHtml5Bucket.".s3.amazonaws.com/" . urlencode($fname);
  $ext = preg_match("/\.mp3$/i") ? "mp3" : "m4a";

  printf('%s{\nname:"%s",\n%s:"%s"\n}', $comma, $fname, $type, $furi);
  $comma = ",\n";
}
?>

Answer 3

<?php 

foreach($bucket_contents as $file){ 
    $fname = $file['name']; 
    $furl = "http://".$isdHtml5Bucket.".s3.amazonaws.com/".urlencode($fname);
    $ext = preg_match("/\.mp3$/i") ? "mp3" : "m4a";

    $t[] = '{name:"'.basename($fname).'",'.$ext.':"'.$furl.'"}';
}

echo implode(',',$t);

你去吧。好多了:)）

在数组的最后一个元素上删除逗号

3 个答案: