php常用数组array函数实例总结【赋值,拆分,合并,计算,添加,删除,查询,判断,排序】

PHP 2020-05-23

《：PHP常用数组array函数实例总结【赋值,拆分,合并,计算,添加,删除,查询,判断,排序】》要点：
本文介绍了：PHP常用数组array函数实例总结【赋值,排序】，希望对您有用。如果有疑问，可以联系我们。

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：PHP编程

array_combinePHP编程

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PHP编程

案例：PHP编程

<?PHP
$a = array("one","two","three");
$b = array("一","二","三");
$c = array_combine($a,$b);
print_r($c);
/**结果
*Array ( [one] => 一 [two] => 二 [three] => 三 )
*/

array_chunkPHP编程

功能：拆分数组成多个数组PHP编程

<?PHP
$input_array = array("a"=>"apple","b"=>"blue","c","d","e");
echo "<pre>";
print_r(array_chunk($input_array,2));
print_r(array_chunk($input_array,2,True));
echo "</pre>";
/**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_valuesPHP编程

功能：统计数组中值出现的次数PHP编程

<?PHP
$input_array = array("a"=>"apple","e");
echo "<pre>";
print_r(array_count_values($input_array));
echo "</pre>";
/**结果
Array
(
 [apple] => 1
 [blue] => 1
 [c] => 1
 [d] => 1
 [e] => 1
)
*/

array_diffPHP编程

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PHP编程

<?PHP
$array1 = array("a"=>"apple","e");
$array2 = array("apple","f");
$result = array_diff($array1,$array2);
$result2 = array_diff($array2,$array1);
echo "<pre>";
print_r($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 "</pre>";
/**结果
Array
(
 [b] => blue
 [2] => e
)
Array
(
 [3] => f
)
*/

array_mapPHP编程

功能：将回调函数执行到数组中PHP编程

<?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 "<pre>";
print_r($b);
echo "</pre>";
/**结果
Array
(
 [0] => 1
 [1] => 8
 [2] => 27
 [3] => 64
 [4] => 125
)
*/

array_mergePHP编程

功能：合并一个或多个数组PHP编程

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PHP编程

<?PHP
$array1 = array("color"=>"red",4);
$array2 = array("a","b","color"=>"green","shape"=>"trapezoid",4);
$result1 = array_merge($array1,$array2);
$result2 = array_merge_recursive($array1,$array2);
echo "<pre>";
print_r($result1);
print_r($result2);
echo "</pre>";
/**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_popPHP编程

功能：剔除数组最后一个元素,返回被剔除的元素内容PHP编程

<?PHP
$stack = array("orange","banana","apple","1");
$last = array_pop($stack);
echo "<pre>";
print_r($stack);
print_r($last);
echo "</pre>";
/**结果
Array
(
 [0] => orange
 [1] => banana
 [2] => apple
)
1
*/

array_pushPHP编程

功能：将一个多个单元压入数组末尾,返回之后的数组个数PHP编程

<?PHP
$stack = array("orange","banana");
$count = array_push($stack,"red","blue");
echo "<pre>";
print_r($stack);
print_r($count);
echo "</pre>";
/**结果
Array
(
 [0] => orange
 [1] => banana
 [2] => apple
 [3] => red
 [4] => blue
)
5
*/

array_randPHP编程

功能：获取随机的键名PHP编程

<?PHP
$input = array("orange","blue");
$rand = array_rand($input,2);;
print_r($rand);
$rand = array_rand($input,3);
print_r($rand);
/**结果
Array
(
 [0] => 1
 [1] => 4
)
Array
(
 [0] => 0
 [1] => 1
 [2] => 3
)
*/

array_searchPHP编程

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PHP编程

<?PHP
$array = array("blue"=>"b","red"=>"r","green","r");
$key = array_search('b',$array);
echo $key;
echo "<br>";
$key = array_search('r',$array);
echo $key;
echo "<br>";
/**结果
blue
red
*/

array_shiftPHP编程

功能：移除开头的元素,与array_pop相反PHP编程

<?PHP
$fruit = array("milk","orange","apple");
$top = array_shift($fruit);
print_r($top);
echo "<br>";
print_r($fruit);
/**结果
milk
Array ( [0] => orange [1] => banana [2] => apple )
*/

array_uniquePHP编程

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PHP编程

<?PHP
$input = array("a"=>"green","b"=>"green","blue","c"=>"red");
$result = array_unique($input);
print_r($result);
echo "<br>";
print_r($input);
/**结果
Array ( [a] => green [0] => red [1] => blue )
Array ( [a] => green [0] => red [b] => green [1] => blue [c] => red )
*/

array_slicePHP编程

功能：从数组中取出部分元素PHP编程

<?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 "<br>";
$output = array_slice($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 "<br>";
$output = array_slice($input,3);
print_r($output);
echo "<br>";
$output = array_slice($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 "<br>";
$output = array_slice($input,-1,true);//第三个参数为true时,保留原有的键值
print_r($output);
echo "<br>";
/**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 )
*/

countPHP编程

功能：返回数组元素个数,元素为数组的算一个PHP编程

<?PHP
$input = array("a",array("d","e"));
$count = count($input);
echo $count;
echo "<br>";
$input = array("a","e");
$count = count($input);
echo $count;
/**结果
4
5
*/

currentPHP编程

功能:获取当前的指针指向元素PHP编程

<?PHP
$array = array("foot","bike","car","plane");
$result = current($array);
echo $result."<br>";
next($array);//使指针指向下一个元素
$result = current($array);
echo $result."<br>";
prev($array);//使指针指向前一个元素
$result = current($array);
echo $result."<br>";
end($array);//使指针指向最后一个元素
$result = current($array);
echo $result."<br>";
/**结果
foot
bike
foot
plane
*/

in_arrayPHP编程

功能：检验某值是否存在数组中,有返回True,没有返回FalsePHP编程

<?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 "<br>";
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 "<br>";
/**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
*/

listPHP编程

功能：将数组中的信息赋值给多个变量PHP编程

<?PHP
$info = array("red","green");
list($flag,$sky,$grassland) = $info;
echo "$flag,$grassland";
echo "<br>";
list($flag,$grassland";
echo "<br>";
list(,$grassland) = $info;
echo "$grassland";
echo "<br>";
/**结果
red,blue,green
red,green
green
*/

shufflePHP编程

功能：打乱数组PHP编程

<?PHP
$numbers = range(1,5);//生成一个随机数组
print_r($numbers);
echo "<br/>";
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_keysPHP编程

功能：获取数组的键名,第二个参数可以指定获取某个元素PHP编程

<?PHP
$array = array(0=>100,"color"=>"red");
print_r(array_keys($array));
echo "<br>";
$array = array("blue","blue");
print_r(array_keys($array,"blue"));
echo "<br>";
$array = array("color"=>array("blue","green"),"size"=>array("small","medium","large"));
print_r(array_keys($array));
echo "<br>";
/**结果
Array ( [0] => 0 [1] => color )
Array ( [0] => 0 [1] => 3 [2] => 4 )
Array ( [0] => color [1] => size )
*/

array_reversePHP编程

功能：获取数组的反向PHP编程

<?PHP
$input = array("PHP",3.0,array("green","red"));
$result = array_reverse($input); //打乱键名
$result_keyed = array_reverse($input,TRUE);//保留键名
print_r($result);
print_r($result_keyed);
/**结果
Array
(
 [0] => Array
  (
   [0] => green
   [1] => red
  )
 [1] => 3
 [2] => PHP
)
Array
(
 [2] => Array
  (
   [0] => green
   [1] => red
  )
 [1] => 3
 [0] => PHP
)
*/

arsortPHP编程

功能：逆向排序,索引不变PHP编程

<?PHP
$fruits = array(
 "a"=>"lemon","b"=>"orange","c"=>"banana","d"=>"apple",);
arsort($fruits);//按照字符逆向排序或数字
foreach($fruits as $key=>$val){
 echo "$key = $val<br>";
}
/**结果
b = orange
a = lemon
c = banana
d = apple
*/

asortPHP编程

功能：进行正向排序PHP编程

<?PHP
$fruits = array(
 "a"=>"lemon",);
arsort($fruits);//按照字符逆向排序或数字
foreach($fruits as $key=>$val){
 echo "$key = $val<br>";
}
echo "<p>";
asort($fruits);//按照字符正向排序或数字
foreach($fruits as $key=>$val){
 echo "$key = $val<br>";
}
/**结果
b = orange
a = lemon
c = banana
d = apple
d = apple
c = banana
a = lemon
b = orange
*/

krsortPHP编程

功能：按照键名进行逆向排序PHP编程

<?PHP
$fruits = array(
 "a"=>"lemon",);
krsort($fruits);//按照键名逆向排序或数字
foreach($fruits as $key=>$val){
 echo "$key = $val<br>";
}
/**结果
d = apple
c = banana
b = orange
a = lemon
*/

ksortPHP编程

功能：按照键名进行正向排序PHP编程

<?PHP
$fruits = array(
 "a"=>"lemon",);
ksort($fruits);//按照键名正向排序或数字
foreach($fruits as $key=>$val){
 echo "$key = $val<br>";
}
/**结果
a = lemon
b = orange
c = banana
d = apple
*/

rsortPHP编程

功能：按照值进行逆向排序,键名改变PHP编程

<?PHP
$fruits = array(
 "a"=>"lemon",);
rsort($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<br>";
}
/**结果
0 = orange
1 = lemon
2 = banana
3 = apple
*/

sortPHP编程

功能：按照值进行正向排序,); 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<br>"; } /**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：《PHP数组(Array)操作技巧大全》、《PHP字符串(string)用法总结》、《PHP常用函数与技巧总结》、《PHP错误与异常处理方法总结》、《PHP基本语法入门教程》、《PHP面向对象程序设计入门教程》、《PHP+MysqL数据库操作入门教程》及《PHP常见数据库操作技巧汇总》PHP编程

希望本文所述对大家PHP程序设计有所帮助.PHP编程

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