如何從多維數組中檢索值？

Question

你知道從這個多維數組我如何檢索值（如字符串）的好方法或技巧：

array (size=5) 
    0 => 
    array (size=1) 
     'email' => 
     array (size=1) 
     0 => string 'lavidabonita@gmail.com' (length=27) 
    1 => 
    array (size=1) 
    'email' => 
    array (size=1) 
     0 => string 'iancasillasbuffon@gmail.com' (length=27) 
    2 => 
    array (size=1) 
    'email' => 
     array (size=1) 
     0 => string 'eddynvg@hotmail.com' (length=19) 
    3 => 
    array (size=1) 
    'email' => 
    array (size=1) 
     0 => string 'dolphin23@dolphin.net' (length=21) 
    4 => 
    array (size=1) 
    'email' => 
    array (size=1) 
     0 => string 'dolphin@dolphin.org' (length=19) 

Answer 1

嘗試這樣的：

function fn($arg){ 
foreach ($arg as $key => $val){ 
    if (is_array($val)){ 
     fn($val); 
    } 
    else{ 
     echo "$key : $val\n"; 
    } 
} 
} 

fn($data);