本文实例总结了PHP常用数组array函数。分享给大家供大家参考，具体如下：
array_combine
功能：用一个数组的值作为新数组的键名，另一个数组的值作为新数组的值
案例：
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一 [two] => 二 [three] => 三 )
*/
array_chunk
功能：拆分数组成多个数组
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"apple","b"=>"blue","c","d","e");
echo "
"; print_r(array_chunk($input_array,2)); print_r(array_chunk($input_array,2,True)); echo ""; /**结果 Array ( [0] => Array ( [0] => apple [1] => blue ) [1] => Array ( [0] => c [1] => d ) [2] => Array ( [0] => e ) ) Array ( [0] => Array ( [a] => apple [b] => blue ) [1] => Array ( [0] => c [1] => d ) [2] => Array ( [2] => e ) ) */
array_count_values
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"apple","e");
echo "
"; print_r(array_count_values($input_array)); echo ""; /**结果 Array ( [apple] => 1 [blue] => 1 [c] => 1 [d] => 1 [e] => 1 ) */
array_diff
功能：第一个数组中去掉第二个数组中有的数据，返回剩下的内容作为结果
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"apple","e");
$array2 = array("apple","f");
$result = array_diff($array1,$array2);
$result2 = array_diff($array2,$array1);
echo "
"; print_r($result);//数组1中去掉数组2中剩下的 print_r($result2);//数组2中去掉数组1中剩下的 echo ""; /**结果 Array ( [b] => blue [2] => e ) Array ( [3] => f ) */
array_map
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PHP
//定义回调函数
function cube($n){
return ($n*$n*$n);
}
$a = array(1,3,4,5);
$b = array_map("cube",$a);
echo "
"; print_r($b); echo ""; /**结果 Array ( [0] => 1 [1] => 8 [2] => 27 [3] => 64 [4] => 125 ) */
array_merge
说明：如果后面有键名相同的会覆盖掉前面的内容，键名为数字的会添加到后面
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"red",4);
$array2 = array("a","b","color"=>"green","shape"=>"trapezoid",4);
$result1 = array_merge($array1,$array2);
$result2 = array_merge_recursive($array1,$array2);
echo "
"; print_r($result1); print_r($result2); echo ""; /**结果 Array ( [color] => green [0] => 2 [1] => 4 [2] => a [3] => b [shape] => trapezoid [4] => 4 ) Array ( [color] => Array ( [0] => red [1] => green ) [0] => 2 [1] => 4 [2] => a [3] => b [shape] => trapezoid [4] => 4 ) */
array_pop
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PHP
$stack = array("orange","banana","apple","1");
$last = array_pop($stack);
echo "
"; print_r($stack); print_r($last); echo ""; /**结果 Array ( [0] => orange [1] => banana [2] => apple ) 1 */
array_push
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PHP
$stack = array("orange","banana");
$count = array_push($stack,"red","blue");
echo "
"; print_r($stack); print_r($count); echo ""; /**结果 Array ( [0] => orange [1] => banana [2] => apple [3] => red [4] => blue ) 5 */
array_rand
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1
[1] => 4
)
Array
(
[0] => 0
[1] => 1
[2] => 3
)
*/
array_search
功能：查询数组中的内容，返回键值，如果有多个匹配，返回第一个匹配的内容
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"b","red"=>"r","green","r");
$key = array_search('b',$array);
echo $key;
echo "
"; $key = array_search('r',$array); echo $key; echo "
"; /**结果 blue red */
"; $key = array_search('r',$array); echo $key; echo "
"; /**结果 blue red */
array_shift
功能：移除开头的元素，与array_pop相反
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PHP
$fruit = array("milk","orange","apple");
$top = array_shift($fruit);
print_r($top);
echo "
"; print_r($fruit); /**结果 milk Array ( [0] => orange [1] => banana [2] => apple ) */
"; print_r($fruit); /**结果 milk Array ( [0] => orange [1] => banana [2] => apple ) */
array_unique
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"green","b"=>"green","blue","c"=>"red");
$result = array_unique($input);
print_r($result);
echo "
"; print_r($input); /**结果 Array ( [a] => green [0] => red [1] => blue ) Array ( [a] => green [0] => red [b] => green [1] => blue [c] => red ) */
"; print_r($input); /**结果 Array ( [a] => green [0] => red [1] => blue ) Array ( [a] => green [0] => red [b] => green [1] => blue [c] => red ) */
array_slice
功能：从数组中取出部分元素
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PHP
$input = array("a","e");
$output = array_slice($input,2);//第二个参数没有时，表示取到最后一个元素
print_r($output);
echo "
"; $output = array_slice($input,-2,1);//第二个参数是正数时，表示个数；倒数第一个是-1，倒数第二个是-2 print_r($output); echo "
"; $output = array_slice($input,3); print_r($output); echo "
"; $output = array_slice($input,-1);//第二个参数是负数时，表示位置，取到哪一位，不包括本身 print_r($output); echo "
"; $output = array_slice($input,-1,true);//第三个参数为true时，保留原有的键值 print_r($output); echo "
"; /**结果 Array ( [0] => c [1] => d [2] => e ) Array ( [0] => d ) Array ( [0] => a [1] => b [2] => c ) Array ( [0] => c [1] => d ) Array ( [2] => c [3] => d ) */
"; $output = array_slice($input,-2,1);//第二个参数是正数时，表示个数；倒数第一个是-1，倒数第二个是-2 print_r($output); echo "
"; $output = array_slice($input,3); print_r($output); echo "
"; $output = array_slice($input,-1);//第二个参数是负数时，表示位置，取到哪一位，不包括本身 print_r($output); echo "
"; $output = array_slice($input,-1,true);//第三个参数为true时，保留原有的键值 print_r($output); echo "
"; /**结果 Array ( [0] => c [1] => d [2] => e ) Array ( [0] => d ) Array ( [0] => a [1] => b [2] => c ) Array ( [0] => c [1] => d ) Array ( [2] => c [3] => d ) */
count
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PHP
$input = array("a",array("d","e"));
$count = count($input);
echo $count;
echo "
"; $input = array("a","e"); $count = count($input); echo $count; /**结果 4 5 */
"; $input = array("a","e"); $count = count($input); echo $count; /**结果 4 5 */
current
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PHP
$array = array("foot","bike","car","plane");
$result = current($array);
echo $result."
"; next($array);//使指针指向下一个元素 $result = current($array); echo $result."
"; prev($array);//使指针指向前一个元素 $result = current($array); echo $result."
"; end($array);//使指针指向最后一个元素 $result = current($array); echo $result."
"; /**结果 foot bike foot plane */
"; next($array);//使指针指向下一个元素 $result = current($array); echo $result."
"; prev($array);//使指针指向前一个元素 $result = current($array); echo $result."
"; end($array);//使指针指向最后一个元素 $result = current($array); echo $result."
"; /**结果 foot bike foot plane */
in_array
功能：检验某值是否存在数组中，有返回True，没有返回False
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PHP
$os_list = array("Mac","NT","Irix","Linux");
if(in_array("Irix",$os_list)){
echo "当前操作系统列表中存在Irix";
}else{
echo "当前操作系统列表中不存在Irix";
}
echo "
"; if(in_array("mac",$os_list)){ echo "当前操作系统列表中存在mac"; }else{ echo "当前操作系统列表中不存在mac"; } echo "
"; /**结果 当前操作系统列表中存在Irix 当前操作系统列表中不存在mac */
"; if(in_array("mac",$os_list)){ echo "当前操作系统列表中存在mac"; }else{ echo "当前操作系统列表中不存在mac"; } echo "
"; /**结果 当前操作系统列表中存在Irix 当前操作系统列表中不存在mac */
list
功能：将数组中的信息赋值给多个变量
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PHP
$info = array("red","green");
list($flag,$sky,$grassland) = $info;
echo "$flag,$grassland";
echo "
"; list($flag,$grassland"; echo "
"; list(,$grassland) = $info; echo "$grassland"; echo "
"; /**结果 red,blue,green red,green green */
"; list($flag,$grassland"; echo "
"; list(,$grassland) = $info; echo "$grassland"; echo "
"; /**结果 red,blue,green red,green green */
shuffle
功能：打乱数组
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PHP
$numbers = range(1,5);//生成一个随机数组
print_r($numbers);
echo "
"; shuffle($numbers);//打乱数组 print_r($numbers); /**结果 Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 [4] => 5 ) Array ( [0] => 4 [1] => 1 [2] => 5 [3] => 2 [4] => 3 ) */
"; shuffle($numbers);//打乱数组 print_r($numbers); /**结果 Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 [4] => 5 ) Array ( [0] => 4 [1] => 1 [2] => 5 [3] => 2 [4] => 3 ) */
array_keys
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100,"color"=>"red");
print_r(array_keys($array));
echo "
"; $array = array("blue","blue"); print_r(array_keys($array,"blue")); echo "
"; $array = array("color"=>array("blue","green"),"size"=>array("small","medium","large")); print_r(array_keys($array)); echo "
"; /**结果 Array ( [0] => 0 [1] => color ) Array ( [0] => 0 [1] => 3 [2] => 4 ) Array ( [0] => color [1] => size ) */
"; $array = array("blue","blue"); print_r(array_keys($array,"blue")); echo "
"; $array = array("color"=>array("blue","green"),"size"=>array("small","medium","large")); print_r(array_keys($array)); echo "
"; /**结果 Array ( [0] => 0 [1] => color ) Array ( [0] => 0 [1] => 3 [2] => 4 ) Array ( [0] => color [1] => size ) */
array_reverse
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Array
(
[0] => green
[1] => red
)
[1] => 3
[2] => PHP
)
Array
(
[2] => Array
(
[0] => green
[1] => red
)
[1] => 3
[0] => PHP
)
*/
arsort
功能：逆向排序，索引不变
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"lemon","b"=>"orange","c"=>"banana","d"=>"apple",);
arsort($fruits);//按照字符逆向排序或数字
foreach($fruits as $key=>$val){
echo "$key = $val
"; } /**结果 b = orange a = lemon c = banana d = apple */
"; } /**结果 b = orange a = lemon c = banana d = apple */
asort
功能：进行正向排序
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"lemon",);
arsort($fruits);//按照字符逆向排序或数字
foreach($fruits as $key=>$val){
echo "$key = $val
"; } echo "
"; } echo "
";
asort($fruits);//按照字符正向排序或数字
foreach($fruits as $key=>$val){
echo "$key = $val
";
}
/**结果
b = orange
a = lemon
c = banana
d = apple
d = apple
c = banana
a = lemon
b = orange
*/
krsort
功能：按照键名进行逆向排序
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"lemon",);
krsort($fruits);//按照键名逆向排序或数字
foreach($fruits as $key=>$val){
echo "$key = $val
"; } /**结果 d = apple c = banana b = orange a = lemon */
"; } /**结果 d = apple c = banana b = orange a = lemon */
ksort
功能：按照键名进行正向排序
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"lemon",);
ksort($fruits);//按照键名正向排序或数字
foreach($fruits as $key=>$val){
echo "$key = $val
"; } /**结果 a = lemon b = orange c = banana d = apple */
"; } /**结果 a = lemon b = orange c = banana d = apple */
rsort
功能：按照值进行逆向排序，键名改变
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"lemon",);
rsort($fruits);//按照值进行逆向排序或数字，键名改变
foreach($fruits as $key=>$val){
echo "$key = $val
"; } /**结果 0 = orange 1 = lemon 2 = banana 3 = apple */
"; } /**结果 0 = orange 1 = lemon 2 = banana 3 = apple */
sort
功能：按照值进行正向排序，键名改变
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"lemon",);
sort($fruits);//按照值进行逆向排序或数字，键名改变
foreach($fruits as $key=>$val){
echo "$key = $val
"; } /**结果 0 = apple 1 = banana 2 = lemon 3 = orange */
"; } /**结果 0 = apple 1 = banana 2 = lemon 3 = orange */
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