A method of using PHP Array_unique implementation of the elimination of two-level array duplicate values, the need for friends can refer to.
| The code is as follows |
Copy Code |
$input = Array ("A" = "green", "" "," Red "," b "=" green "," "," Blue "," Red "," c "=" Witer "," Hello "," witer ");
$result = Array_unique ($input); Remove duplicate elements
$result = A_array_unique ($input);?? Leaving only a single element
foreach ($result as $AA)
{
echo $aa. "
”;
}
function Multi_unique ($array) {
foreach ($array as $k = $na)
$new [$k] = serialize ($NA);
$uniq = Array_unique ($new);
foreach ($uniq as $k = $ser)
$new 1[$k] = unserialize ($ser);
Return ($new 1);
} function A_array_unique ($array)//write Better
{
$out = Array ();
foreach ($array as $key = = $value) {
if (!in_array ($value, $out))
{
$out [$key] = $value;
}
}
return $out;
}
?> |
The Array_unique function applies only to one-dimensional arrays and does not apply to multidimensional arrays, but we can implement array_unique to remove duplicate arrays by traversing the data and then manipulating it.
| code as follows |
copy code |
function Unique_arr ($array, $stkeep =false, $ndformat =true)
{
Determines whether to preserve the first-level array key (the first-level array key can be non-numeric)
if ($stkeep) $STARR = Array_keys ($array 2D);
Determines whether to preserve level two array keys (all two-level array keys must be the same)
if ($ndformat) $NDARR = Array_keys (end ($array 2D));
Dimension, you can also convert one-dimensional array to a comma-concatenated string using implode
foreach ($array 2D as $v) {
$v = Join (",", $v);
$temp [] = $v;
}
Remove duplicate strings, that is, duplicate one-dimensional arrays
$temp = Array_unique ($temp);
Re-assemble the disassembled array
foreach ($temp as $k = $v)
{
if ($stkeep) $k = $STARR [$k];
if ($ndformat)
{
$TEMPARR = Explode (",", $v);
foreach ($tempArr as $ndkey = $ndval) $output [$k] [$NDARR [$ndkey]] = $ndval;
}
else $output [$k] = Explode (",", $v);
}
return $output;
}
$array 2D = Array (' First ' =>array (' title ' = ' 1111′ ', ' date ' = ' 2222′ '), ' second ' =>array (' title ' = ' 1111′ ', ' Date ' = ' 2222′), ' third ' =>array (' title ' = ' 2222′ ', ' date ' = ' 3333′ ');
Print_r ($array 2D);
Print_r (Unique_arr ($array 2d,true)); |
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