How can i apply a function on a multidimensional array? - php

Question

I'm using some php functions for security.
function whileToArray($qr)
{
while($rs = mysql_fetch_assoc($qr))
{
$data[] = $rs;
}
$data = array_map('htmlspecialchars_decode',$data);
$data = array_map('htmlentities',$data);
return $data;
}
When i running this code, I get;
Warning: htmlspecialchars_decode() expects parameter 1 to be string, array given in C:\AppServ\www\bigbeng\classes\get.class.php on line 22
Warning: htmlspecialchars_decode() expects parameter 1 to be string, array given in C:\AppServ\www\bigbeng\classes\get.class.php on line 22
print_r($data):
Array ( [0] => Array ( [kategori_id] => 1 [kategori_adi] => Spor )
[1] => Array ( [kategori_id] => 2 [kategori_adi] => Siyaset ) )
How can i use these functions with array?

Answer 1

array_map works with 1D array not on multidimensional array. so try with below function
function array_map_recursive($fn, $arr) {
$rarr = array();
foreach ($arr as $k => $v) {
$rarr[$k] = is_array($v)
? array_map_recursive($fn, $v)
: $fn($v); // or call_user_func($fn, $v)
}
return $rarr;
}
then call
$data = array_map_recursive('htmlspecialchars_decode',$data);

Answer 2

You should move your decoding logic inside the inner while loop:
function whileToArray($qr)
{
while($rs = mysql_fetch_assoc($qr))
{
$rs = array_map('htmlspecialchars_decode',$rs);
$rs = array_map('htmlentities',$rs);
$data[] = $rs;
}
return $data;
}
This is a very incorrect approach though. Your logic assumes that absolutely all data stored in your database is HTML-encoded; IDs, numeric values, timestamps, everything. You should not HTML-encode any data in your database, HTML-encoding should be performed only when you actually want to embed a value in HTML.