<?php
$aa = array("apple", "banana", "pear", "apple", "wail", "watermalon");
$bb = array_unique($aa);
print_r($bb);
?>

<?php

function assoc_unique($arr, $key) {
  $tmp_arr = array();
  foreach ($arr as $k => $v) {
    if (in_array($v[$key], $tmp_arr)) {//搜索$v[$key]是否在$tmp_arr數(shù)組中存在，若存在返回true
      unset($arr[$k]);
    } else {
      $tmp_arr[] = $v[$key];
    }
  }
  sort($arr); //sort函數(shù)對(duì)數(shù)組進(jìn)行排序
  return $arr;
}

$aa = array(
  array('id' => 123, 'name' => '張三'),
  array('id' => 123, 'name' => '李四'),
  array('id' => 124, 'name' => '王五'),
  array('id' => 125, 'name' => '趙六'),
  array('id' => 126, 'name' => '趙六')
);
$key = 'id';
assoc_unique(&$aa, $key);
print_r($aa);
?>

Array ( [0] => Array ( [id] => 123 [name] => 張三 ) [1] => Array ( [id] => 124 [name] => 王五 ) [2] => Array ( [id] => 125 [name] => 趙六 ) [3] => Array ( [id] => 126 [name] => 趙六 ) )

<?php

function array_unique_fb($array2D) {
  foreach ($array2D as $v) {
    $v = join(",", $v); //降維,也可以用implode,將一維數(shù)組轉(zhuǎn)換為用逗號(hào)連接的字符串
    $temp[] = $v;
  }
  $temp = array_unique($temp);//去掉重復(fù)的字符串,也就是重復(fù)的一維數(shù)組
  foreach ($temp as $k => $v) {
    $temp[$k] = explode(",", $v);//再將拆開的數(shù)組重新組裝
  }
  return $temp;
}
$aa = array(
  array('id' => 123, 'name' => '張三'),
  array('id' => 123, 'name' => '李四'),
  array('id' => 124, 'name' => '王五'),
  array('id' => 123, 'name' => '李四'),
  array('id' => 126, 'name' => '趙六')
);
$bb = array_unique_fb($aa);
print_r($bb)
?>

Array ( [0] => Array ( [0] => 123 [1] => 張三 ) [1] => Array ( [0] => 123 [1] => 李四 ) [2] => Array ( [0] => 124 [1] => 王五 ) [4] => Array ( [0] => 126 [1] => 趙六 ) )