In php, array_unique removes repeated arrays from two-dimensional arrays. In php, array_unique is used to remove duplicate values of list-level arrays. For more information, see. The code is as follows: Copy the code? Php $ inputarray (agreen, red, bgre): array_unique in php is used to remove duplicate values of list-level arrays. For more information, see.
| The code is as follows: |
|
$ 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 );?? // Only leaves 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)
$ New1 [$ k] = unserialize ($ ser );
Return ($ new1 );
} 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 is only applicable to one-dimensional arrays and does not apply to multi-dimensional arrays. However, we can use the traversal data and then perform operations to remove repeated arrays.
| The code is as follows: |
|
Function unique_arr ($ array2D, $ stkeep = false, $ ndformat = true)
{
// Determine whether the primary array key is retained (the primary array key can be non-numeric)
If ($ stkeep) $ stArr = array_keys ($ array2D );
// Determine whether the secondary array key is retained (all secondary array keys must be the same)
If ($ ndformat) $ ndArr = array_keys (end ($ array2D ));
// Dimensionality reduction. you can also use implode to convert a one-dimensional array to a string connected with commas (,).
Foreach ($ array2D as $ v ){
$ V = join (",", $ v );
$ Temp [] = $ v;
}
// Remove the duplicate string, that is, the duplicate one-dimensional array.
$ Temp = array_unique ($ temp );
// Re-assemble the split 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;
}
$ Array2D = array ('first' => array ('title' => '000000', 'date' => '000000 ′), 'second' => array ('title' => '123', 'date' => '123 ′), 'third' => array ('title' => '000000', 'date' => '000000 ′));
Print_r ($ array2D );
Print_r (unique_arr ($ array2D, true )); |
Bytes. The code is as follows? Php $ input = array (a = green, red, B = gre...
