PHP-PHP source code

This article lists three methods of removing repeated element functions and instance code from an array. The first two methods are to use loops to determine whether to delete repeated array values. The last one is more classic than the previous one. The array_flip () to change the value to the key name, and then return the duplicate key name will be lost. This article lists three methods of removing repeated element functions and instance code from an array. The first two methods are to use loops to determine whether to delete repeated array values. The last one is more classic than the previous one. The array_flip () to change the value to the key name, and then return the duplicate key name will be lost.

Script ec (2); script

Function delsame (& $ array)
{
$ I = 0;
While (isset ($ array [$ I])
{
$ J = $ I + 1;
While (isset ($ array [$ j])
{
If ($ array [$ I] = $ array [$ j]) // if duplicate elements are found
{
Delmember ($ array, $ j); // delete it
$ J --; // re-check whether the supplemented elements are repeated.
}
$ J ++;
}
$ I ++;
}
}

// Delete the function of repeating elements in the array

The Code is as follows:
Function delmember (& $ array, $ id) { $ Size = count ($ array ); For ($ I = 0; $ I <$ size-$ id-1; $ I ++) { $ Array [$ id + $ I] = $ array [$ id + $ I + 1]; } Unset ($ array [$ size-1]); }

// Example:

The Code is as follows:
$ Output = array (1, 2, 2, 'www .111cn.net ', 5, 4, 4, 4, 2, 7, 5, 9, 10 ); Delsame ($ output ); While (list ($ key, $ value) = each ($ output )) { Echo "$ key: $ value "." "; }

// Method 2

The Code is as follows:
Function uniquearray ($ array) { // Get unique elts as keys in assoc. array For ($ I = 0, $ n = count ($ array, 1); $ I <$ n; $ I) $ U_array [$ array [$ I] = 1; // Copy keys only into another array Reset ($ u_array, 1 ); For ($ I = 0, $ n = count ($ u_array, 1); $ I <$ n; $ I ){ $ Unduplicated_array [] = key ($ u_array, 1 ); Next ($ u_array, 1 ); } Return $ unduplicated_array; }

// Method 3

The Code is as follows:
$ Hills = array ("first" => "data1", "second" => "www.111cn.net", "third" => "data1 "); $ Hills = array_flip ($ hills); // restore key name $ Hills1 = array_flip ($ hills); // Delete duplicate Print_r ($ hills1 );

/*
Array array_flip (array trans)
Array_flip () returns an inverted array. For example, the key name in trans is changed to a value, and the value in trans is changed to a key name.
Note that the value in trans must be valid key names, for example, integer or string. If the value type is incorrect, a warning will be issued, and the problematic key/value pair will not be reversed.
If the same value appears multiple times, the last key name is used as its value, and all others are lost.
Array_flip () returns false if it fails.

*/