Preg matching $ _FILES

Question

我想从$ _FILES中捕获扫描，因为总会传递一个空的扫描输入名称，其他varry可以更改，我需要获取$ _FILES名称和数字。你有什么建议如何做到这一点？

// Skipping the empty scan, and getting the 0-100 possible 
$results = preg_grep('/^scan\d{1,2}$/', $_FILES); 

生成数组字符串转换错误

的后转储

["scan0"]=> 
    array(5) { 
    ["name"]=> 
    string(6) "2.jpeg" 
    ["type"]=> 
    string(10) "image/jpeg" 
    ["tmp_name"]=> 
    string(24) "C:\xampp\tmp\phpD7B4.tmp" 
    ["error"]=> 
    int(0) 
    ["size"]=> 
    int(24618) 
    } 
    ["scan1"]=> 
    array(5) { 
    ["name"]=> 
    string(6) "2.jpeg" 
    ["type"]=> 
    string(10) "image/jpeg" 
    ["tmp_name"]=> 
    string(24) "C:\xampp\tmp\phpD7B5.tmp" 
    ["error"]=> 
    int(0) 
    ["size"]=> 
    int(24618) 
    } 
    ["scan"]=> 
    array(5) { 
    ["name"]=> 
    string(0) "" 
    ["type"]=> 
    string(0) "" 
    ["tmp_name"]=> 
    string(0) "" 
    ["error"]=> 
    int(4) 
    ["size"]=> 
    int(0) 
    } 

Answer 1

$scankeys = []; 

foreach($scans as $key => $scan) 
{ 
    if(preg_match("/^scan[0-9]{1,2}$/", $key)){ 
    $scankeys[] = $key; 
    } 
} 

我笑我们提到这比试图结合多个数组操作函数来获得相同的结果要好。

Answer 2

请注意：array_filter与标志只能用于PHP版本> = 5.6

$scans = array_filter($_FILES, function ($key, $scan) { 
    return $key != 'otherscan' && !empty($scan['name']); 
}, ARRAY_FILTER_USE_BOTH); 

$names = array_combine(
    array_keys($scans), 
    array_map(function ($scan) { 
     return $scan['size']; 
    }, $scans) 
); 

var_dump($names);