如何在PHP中使用字符串调用数组

Question

I would like to echo a bunch of arrays in numerical order, I tried using WHILE method but lacks the knowledge on how to combine strings to call a variable and get the value inside the array.

$ins1 = array ( 
              "select"  => array (  
                                   "1" => "1"
                                   ), 
              "note"  => array ( 
                                   "1" => "Message"
                                   )
              ); 

$ins2 = array ( 
              "select"  => array (  
                                   "1" => "2"
                                   ), 
              "note"  => array ( 
                                   "1" => "Sorry"
                                   )
              ); 


$count = 1;
while($count <= 2){
    $ins = '$ins'.$count;
    echo $ins["select"][$count] .' '. $ins["note"][$count].'<br>';
    $count++;
}

OUTPUT SHOULD BE:

1 Message
2 Sorry

Answer 1

What you're looking for is "Variable variables", through which you can set the variable name dynamically; so to get what you want, change your code as the following:

$count = 1;
while($count <= 2){
    $ins = 'ins'.$count;
    $var = $$ins; // now your $var is either $ins1 or $ins2 :)
    echo $var["select"][1] .' '. $var["note"][1].'<br>';
    $count++;
}

The output would be:

1 Message
2 Sorry