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@ 2014-01-06T00:26:30Z

<?php

$array = array('title1','title2','title2','title3','title4','title5','title5','title6','title6','title5');

sort($array);
$unique_length = count( array_unique($array) );
$total_dupes = 0;

$clean = array();

for ($i=0; $i<$unique_length; $i++) {
    $current = array_shift($array);
    if ($current === NULL)//already have all elements
        break;
    
    $found = 1;
    while (($key = array_search($current, $array)) !== FALSE) {//search for dupes
        $found++;
        unset($array[$key]);
    }
    
    if ($found == 1)
        array_push($clean, $current);
    else {
        $dupes = array();
        for ($i=0; $i<$found; $i++)
            $dupes[] = $current;
        $total_dupes++;
        $clean['dupe'.$total_dupes] = $dupes;
    }
}


print_r($array);
print_r($clean);

Output for git.master, git.master_jit, rfc.property-hooks: Array ( ) Array ( [0] => title1 [dupe1] => Array ( [0] => title2 [1] => title2 ) [1] => title3 [2] => title4 [dupe2] => Array ( [0] => title5 [1] => title5 [2] => title5 ) [dupe3] => Array ( [0] => title6 [1] => title6 ) )

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2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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