php数组删除元素各种方法总结

$a=array(0=>"Dog",1=>"Cat",2=>"Horse",3=>"Bird");
print_r(array_slice($a,1,2));
?>

输出

Array ( [0] => Cat [1] => Horse )

$array = array('1', '2', '3', '4', '5');

$del_value = 3;
unset($array[array_search($del_value , $array)]);//利用unset删除这个元素

print_r($array);

输出

array('1', '2', '4', '5');

$fruits = array("apple","banana","orange","pear");
$fruit = array_shift($fruits);
// $fruits = array("banana","orange","pear")
// $fruit = "apple";

$fruits = array("apple","banana","orange","pear");
$fruit = array_pop($fruits);
//$fruits = array("apple","banana","orange");
//$fruit = "pear";

function deleteElementFromArr($arr, $index){
if($index < count($arr)-1){
unset($arr[$index]);
reset($arr);
}
return $arr;
}

function array_remove(&$arr, $offset)
{
array_splice($arr, $offset, 1);
}

$arr = array('apple','banana','cat','dog');

array_remove($arr, 2);
print_r($arr);
?>

function assoc_unique($arr, $key) {
$tmp_arr = array();
foreach($arr as $k => $v) {
if(in_array($v[$key], $tmp_arr)) {
unset($arr[$k]);
} else {
$tmp_arr[] = $v[$key];
}
}
sort($arr);
return $arr;
}

$aa = array(
array('id' => 123, 'name' => '张三'),
array('id' => 123, 'name' => '李四'),
array('id' => 124, 'name' => '王五'),
array('id' => 125, 'name' => '赵六'),
array('id' => 126, 'name' => '赵六')
);
$key = 'name';
assoc_unique(&$aa, $key);
print_r($aa);
?>