php常用数组array函数实例总结【赋值,拆分,合并,计算,添加,删除,
发布时间：2020-12-12 21:54:41 所属栏目：PHP教程 来源：网络整理
导读：本文实例总结了php常用数组array函数。供大家参考研究具体如下： 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： 一 [two] => 二 [three] => 三 )*/ array_chunk 功能：拆分数组成多个数组 "apple","b"=
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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： 一 [two] => 二 [three] => 三 )
*/
array_chunk功能：拆分数组成多个数组 "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功能：统计数组中值出现的次数 "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 "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($result2);//数组2中去掉数组1中剩下的 echo ""; /**结果 Array ( [b] => blue [2] => e ) Array ( [3] => f ) */ array_map功能：将回调函数执行到数组中 ";
print_r($b);
echo "";
/**结果
Array
(
[0] => 1
[1] => 8
[2] => 27
[3] => 64
[4] => 125
)
*/
array_merge功能：合并一个或多个数组 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 "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($result2); echo ""; /**结果 Array ( [color] => green [0] => 2 [1] => 4 [2] => a [3] => b [shape] => trapezoid [4] => 4 ) Array ( [color] => Array ( [0] => red [1] => green ) [0] => 2 [1] => 4 [2] => a [3] => b [shape] => trapezoid [4] => 4 ) */ array_pop功能：剔除数组最后一个元素，返回被剔除的元素内容 ";
print_r($stack);
print_r($last);
echo "";
/**结果
Array
(
[0] => orange
[1] => banana
[2] => apple
)
1
*/
array_push功能：将一个多个单元压入数组末尾，返回之后的数组个数 ";
print_r($stack);
print_r($count);
echo "";
/**结果
Array
(
[0] => orange
[1] => banana
[2] => apple
[3] => red
[4] => blue
)
5
*/
array_rand功能：获取随机的键名 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 "b","red"=>"r","green","r");
$key = array_search('b',$array);
echo $key;
echo "
"; $key = array_search('r',$array); echo $key; echo " "; /**结果 blue red */ array_shift功能：移除开头的元素，与array_pop相反 ";
print_r($fruit);
/**结果
milk
Array ( [0] => orange [1] => banana [2] => apple )
*/
array_unique功能：去除数组重复的元素，保留第一个出现的，包括键名和值 "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 ) */ array_slice功能：从数组中取出部分元素 ";
$output = array_slice($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功能：返回数组元素个数，元素为数组的算一个 ";
$input = array("a","e");
$count = count($input);
echo $count;
/**结果
4
5
*/
current功能:获取当前的指针指向元素 ";
next($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 $result." "; /**结果 foot bike foot plane */ in_array功能：检验某值是否存在数组中，有返回True，没有返回False ";
if(in_array("mac",$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 ";
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 "; 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功能：获取数组的键名，第二个参数可以指定获取某个元素 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_reverse功能：获取数组的反向 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 "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 = $val
"; } /**结果 b = orange a = lemon c = banana d = apple */ asort功能：进行正向排序 "lemon",);
arsort($fruits);//按照字符逆向排序或数字
foreach($fruits as $key=>$val){
echo "$key = $val
"; } echo " ";
asort($fruits);//按照字符正向排序或数字
foreach($fruits as $key=>$val){
echo "$key = $val krsort功能：按照键名进行逆向排序 "lemon",);
krsort($fruits);//按照键名逆向排序或数字
foreach($fruits as $key=>$val){
echo "$key = $val
"; } /**结果 d = apple c = banana b = orange a = lemon */ ksort功能：按照键名进行正向排序 "lemon",);
ksort($fruits);//按照键名正向排序或数字
foreach($fruits as $key=>$val){
echo "$key = $val
"; } /**结果 a = lemon b = orange c = banana d = apple */ rsort功能：按照值进行逆向排序，键名改变 "lemon",);
rsort($fruits);//按照值进行逆向排序或数字，键名改变
foreach($fruits as $key=>$val){
echo "$key = $val
"; } /**结果 0 = orange 1 = lemon 2 = banana 3 = apple */ sort功能：按照值进行正向排序，键名改变 "lemon",);
sort($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 */ 更多关于PHP相关内容感兴趣的读者可查看本站专题：《》、《》、《》、《》、《》、《》、《》及《》 希望本文所述对大家PHP程序设计有所帮助。 （编辑：李大同） 【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容! |
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