PHP 數組函數

PHP 提供了各種數組函數來訪問和操作數組的元素。愛掏網 - it200.com以下是重要的 PHP 數組函數。愛掏網 - it200.com

PHP array() 函數創建并返回一個數組。愛掏網 - it200.com它允許您創建索引、關聯和多維數組。愛掏網 - it200.com

語法

array array ([ mixed $... ] )

示例

<?php    
season=array("summer","winter","spring","autumn");    
echo "Season are:season[0], season[1],season[2] and $season[3]";    
?>   

輸出:

Season are: summer, winter, spring and autumn

PHP array_change_key_case() 函數

PHP array_change_key_case() 函數改變數組中所有鍵的大小寫。愛掏網 - it200.com

注意：它只改變鍵的大小寫。愛掏網 - it200.com

語法

array array_change_key_case ( array array [, intcase = CASE_LOWER ] )

示例

"550000","Vimal"=>"250000","Ratan"=>"200000");  
print_r(array_change_key_case($salary,CASE_UPPER)); 
?>  

輸出：

Array ( [SONOO] => 550000 [VIMAL] => 250000 [RATAN] => 200000 )

示例

"550000","Vimal"=>"250000","Ratan"=>"200000");  
print_r(array_change_key_case($salary,CASE_LOWER)); 
?>  

輸出:

Array ( [sonoo] => 550000 [vimal] => 250000 [ratan] => 200000 )

PHP array_chunk()函數

PHP array_chunk()函數將數組分割為多個塊。愛掏網 - it200.com使用array_chunk()方法，你可以將數組分割為許多部分。愛掏網 - it200.com

語法

array array_chunk ( array array , intsize [, bool $preserve_keys = false ] )

示例

"550000","Vimal"=>"250000","Ratan"=>"200000");  
print_r(array_chunk($salary,2)); 
?>  

輸出：

Array ( 
[0] => Array ( [0] => 550000 [1] => 250000 ) 
[1] => Array ( [0] => 200000 )
)

PHP count() 函數

PHP count() 函數計算數組中的所有元素。愛掏網 - it200.com

語法

int count ( mixed array_or_countable [, intmode = COUNT_NORMAL ] )

示例

<?php    
season=array("summer","winter","spring","autumn");    
echo count(season);    
?>    

輸出：

4

PHP sort()函數

PHP sort()函數對數組中的所有元素進行排序。愛掏網 - it200.com

語法

bool sort ( array &array [, intsort_flags = SORT_REGULAR ] )

示例

<?php    
season=array("summer","winter","spring","autumn");    
sort(season);  
foreach( season ass )    
{    
  echo "$s<br />";    
}    
?>    

輸出：

autumn
spring
summer
winter

PHP array_reverse() 函數

PHP array_reverse() 函數返回一個包含元素按逆序排列的數組。愛掏網 - it200.com

語法

array array_reverse ( array array [, boolpreserve_keys = false ] )

示例

<?php    
season=array("summer","winter","spring","autumn");reverseseason=array_reverse(season);  
foreach(reverseseason as s )    
{     echo "s<br />";    
}    
?>    

輸出：

autumn
spring
winter
summer

PHP array_search()函數

PHP array_search()函數在數組中搜索指定的值。愛掏網 - it200.com如果搜索成功，則返回鍵。愛掏網 - it200.com

語法

mixed array_search ( mixed needle , arrayhaystack [, bool $strict = false ] )

示例

<?php    
season=array("summer","winter","spring","autumn");key=array_search("spring",season);  
echokey;    
?>    

輸出：

2

PHP array_intersect()函數

PHP array_intersect()函數返回兩個數組的交集。愛掏網 - it200.com換句話說，它返回兩個數組中相匹配的元素。愛掏網 - it200.com

語法

array array_intersect ( array array1 , arrayarray2 [, array $... ] )

示例

<?php    
name1=array("sonoo","john","vivek","smith");name2=array("umesh","sonoo","kartik","smith");    
name3=array_intersect(name1,name2);  
foreach(name3 as n )    
{     echo "n<br />";    
}    
?>      

輸出：

sonoo
smith