遍历数组php

Question

我有这个数组…如何打印每个文件路径和文件名？做这个的最好方式是什么？

  Array ( 
    [0] => Array ( 
             [fid] => 14 
             [list] => 1 
             [data] => Array ( 
                         [alt] => 
                         [title] => 
                       )
             [uid] => 1 
             [filename] => trucks_10785.jpg 
             [filepath] => sites/default/files/trucks_10785.jpg 
             [filemime] => image/jpeg 
             [filesize] => 143648 
             [status] => 1 
             [timestamp] => 1291424171 
             [nid] => 8 
           ) 
    [1] => Array ( 
             [fid] => 19 
             [list] => 1 
             [data] => Array ( 
                         [alt] => 
                         [title] => 
                       ) 
             [uid] => 1 
             [filename] => school.jpg 
             [filepath] => sites/default/files/school.jpg 
             [filemime] => image/jpeg 
             [filesize] => 115355 
             [status] => 1 
             [timestamp] => 1292029563 
             [nid] => 8 
           ) 
    [2] => Array ( 
             [fid] => 20 
             [list] => 1 
             [data] => Array ( 
                         [alt] => 
                         [title] => 
                       )     
             [uid] => 1 
             [filename] => Life_is_wonderful_by_iNeedChemicalX.jpg 
             [filepath] => sites/default/files/Life_is_wonderful_by_iNeedChemicalX_0.jpg 
             [filemime] => image/jpeg 
             [filesize] => 82580 
             [status] => 1 
             [timestamp] => 1292029572 
             [nid] => 8 
           )
    [3] => Array ( 
             [fid] => 21 
             [list] => 1 
             [data] => Array ( 
                         [alt] => 
                         [title] => 
                       ) 
             [uid] => 1 
             [filename] => school_rural.jpg 
             [filepath] => sites/default/files/school_rural.jpg 
             [filemime] => image/jpeg 
             [filesize] => 375088 
             [status] => 1 
             [timestamp] => 1292029582 
             [nid] => 8 
           ) 
  )

Answer 1

使用foreach无键循环

foreach($array as $item) {
    echo $item['filename'];
    echo $item['filepath'];

    // to know what's in $item
    echo '<pre>'; var_dump($item);
}

使用foreach键循环

foreach($array as $i => $item) {
    echo $item[$i]['filename'];
    echo $item[$i]['filepath'];

    // $array[$i] is same as $item
}

使用for循环

for ($i = 0; $i < count($array); $i++) {
    echo $array[$i]['filename'];
    echo $array[$i]['filepath'];
}

var_dump 是获取数组或对象快照的非常有用的功能。