《PHP学习：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学习：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】，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
$input_array = array("a"=>"apple","b"=>"blue","c","d","e");
echo "<pre>";
print_r(array_count_values($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","b"=>"blue","c","d","e");
$array2 = array("apple","c","d","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(1,2,3,4,5);
$b = array_map("cube",$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",2,4);
$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,"apple","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","banana","apple","red","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","banana","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","red","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","b","c","d","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,0,3);
print_r($output);
echo "<br>";
$output = array_slice($input,2,-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,2,-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","b","c",array("d","e"));
$count = count($input);
echo $count;
echo "<br>";
$input = array("a","b","c","d","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
$info = array("red","blue","green");
list($flag,$sky,$grassland) = $info;
echo "$flag,$sky,$grassland";
echo "<br>";
list($flag,,$grassland) = $info;
echo "$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>";
$array = array("blue","red","green","blue","blue");
print_r(array_keys($array,"blue"));
echo "<br>";
$array = array("color"=>array("blue","red","green"),"size"=>array("small","medium","large"));
print_r(array_keys($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
$fruits = array(
"a"=>"lemon",
"b"=>"orange",
"c"=>"banana",
"d"=>"apple",
);
arsort($fruits);//按照字符逆向排序或数字
foreach($fruits as $key=>$val){
echo "$key = $val<br>";
}
echo "<p>";
asort($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
$fruits = array(
"a"=>"lemon",
"b"=>"orange",
"c"=>"banana",
"d"=>"apple",
);
krsort($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
$fruits = array(
"a"=>"lemon",
"b"=>"orange",
"c"=>"banana",
"d"=>"apple",
);
ksort($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
$fruits = array(
"a"=>"lemon",
"b"=>"orange",
"c"=>"banana",
"d"=>"apple",
);
rsort($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,键名改变PHP编程
<?php
$fruits = array(
"a"=>"lemon",
"b"=>"orange",
"c"=>"banana",
"d"=>"apple",
);
sort($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
*/
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