Prepared By : Uday Shah (HOD-IT)
Contact No : 7600044051
E Mail : rupareleducation@gmail.com
PHP Array Function
No
|
Name
|
Description
|
1
|
List
|
It assign
variable as if they were an array.
Syntax:
list(varname)
Example:
<?php
$info=array(‘coffee’,’brown’,’caffine’);
list($drink,$color,$power)=info;
echo “$drink is
$color and $power makes it special.”;
?>
|
2
|
count()
|
It counts
element an array or properties in an object. It returns the number of
elements in a variable.
Syntax
int
count(element)
Example
$a[0]=1;
$a[1]=3;
$a[2]=5;
$result=count($a);
|
3
|
in_array()
|
Checks if a
value is exists in an array or not.
Syntax:
in_array(elements)
<?php
$x=array(“NT”,”UNIX”,”Linux”,”Solaries”);
if(in_array(“Linux”,$x))
{
Echo
“Got Linux”;
}
else
{
Echo “Not Found”;
}
?>
|
4
|
current()
|
It returns the
current elements in an array.
Syntax:
current (list of
element)
Example.
<?php
$transport=array(“foot”,”bike”,”car”,”Plane”);
$mode=current($transport);
?>
|
5
|
next()
|
It is used to
return next element in an array. That is pointed to the internal array
pointer.
Syntax: next
(list of element)
Example
<?php
$transport=array(“foot”,”bike”,”car”,”Plane”);
$mode=current($transport); //ans=foot
$mode=next($transport); //ans=bike
?>
|
6
|
prev()
|
It returns the
array value in the previous place that is pointed to the internal array
pointer.
Syntax:
prev (list of element)
Example
<?php
$transport=array(“foot”,”bike”,”car”,”Plane”);
$mode=current($transport);
$mode=next($transport);
$mode=prev($transport);
?>
|
7
|
end()
|
It is used to
set internal pointer of an array to its last element.
Syntax:
end (list of
element)
Example.
<?php
$transport=array(“foot”,”bike”,”car”,”Plane”);
$mode=current($transport); //ans=foot
$mode=next($transport); //ans=bike
$mode=next($transport); //ans=car
$mode=prev($transport); //ans=bike
$mode=end($transport); //ans=plane
?>
|
8
|
sort()
|
It sorts an
array element be arranged from lowest to highest when this function has
completed.
This function
assigns new key for the element in array, it will remove any existing keys
you may have assigned.
Syntax:
sort(list of array element)
Ex:
<?php
$fruits=array(“lemon”,”orange”,”banana”,”apple”);
Sort($fruits);
Foreach($fruits as $key=>$val)
{
Echo “fruits[“. $key .”]=”.$val;
}
?>
O/P
Fruits[0]=apple
Fruits[1]=banana
Fruits[2]=lemon
Fruits[3]=orange
|
9
|
rsort()
|
This function
sorts an array in reverse order from highest to lowest value.
Syntax
rsort(list of
element)
Example
<?php
$fruits=array(“lemon”,”orange”,”banana”,”apple”);
rsort($fruits);
Foreach($fruits as $key=>$val)
{
Echo “fruits[“. $key .”]=”.$val;
}
?>
|
10
|
asort()
|
It sorts an
array and maintain index association this function sorts an array such that
array indices maintain their co relation with the array element they are
associated with.
Syntax
asort(list of
element)
Example
<?php
$fruits=array(“d”=>”lemon”,”a”=>”orange”,”b”=>”banana”,”c”=>”apple”);
asort($fruits);
foreach($fruits
as $key =>$val)
{
Echo “$key=$val”;
}
?>
O/P
c=apple
b=banana
d=lemon
a=orange
|
11
|
arsort()
|
Sort an array in
reverse order and maintain index association.
Syntax:
arsort(list of
element)
Example
<?php
$fruits=array(“d”=>”lemon”,”a”=>”orange”,”b”=>”banana”,”c”=>”apple”);
arsort($fruits);
foreach($fruits as $key =>$val)
{
Echo
“$key=$val”;
}
?>
|
12
|
array_shift()
|
array_shift ()
function removes the first element from an array, and returns the value of
the removed element.
Syntax
Array_shift(array)
Example
Remove the first element (red) from an array, and
return the value of the removed element:
<?php
$a=array("a"=>"red","b"=>"green","c"=>"blue"); echo array_shift($a); print_r ($a); ?> |
13
|
Array_diff ()
|
The array_diff () function compares the values of two (or more) arrays, and returns
the differences.This function compares the values of two (or more) arrays,
and return an array that contains the entries from array1 that are not present in array2 or array3, etc.
Syntax
Array_diff(array1,array2,array3...);
Example
<?php
$a1=array("a"=>"red","b"=>"green","c"=>"blue","d"=>"yellow"); $a2=array("e"=>"red","f"=>"green","g"=>"blue"); $result=array_diff($a1,$a2); print_r($result); ?> |
14
|
Array_merge_recursive
()
|
|
The array_merge_recursive () function merges one or
more arrays into one array. The difference between this function and the array_merge() function is when two or more array
elements have the same key. Instead of override the keys, the
array_merge_recursive () function makes the value as an array.
Syntax
Array_merge_recursive(array1,array2,array3...)
Example
Merge two arrays into one array:
<?php
$a1=array("a"=>"red","b"=>"green"); $a2=array("c"=>"blue","b"=>"yellow"); print_r(array_merge_recursive($a1,$a2)); ?> |
||
15
|
Array_slice () |
The array_slice() function returns selected parts of
an array.
Syntax
Array_slice(array,start,length,preserve)
Example
Start the slice
the 2 array element, and return the rest of the elements in the array:
<?php
$a=array("red","green","blue","yellow","brown"); print_r(array_slice($a,2)); ?> |
16
|
Array_unique () |
The array_unique () function removes duplicate
values from an array. If two or more array values are the same, the first
appearance will be kept and the other will be removed.
Syntax
array_unique(array)
Example
Remove duplicate values from an array:
<?php
$a=array("a"=>"red","b"=>"green","c"=>"red"); print_r(array_unique($a)); ?> |
17
|
Array_unshift () |
The array_unshift() function inserts new elements to
an array. The new array values will be inserted in the beginning of the
array.
Syntax
array_unshift(array,value1,value2,value3...)
Example
Insert the element
"blue" to an array:
<?php
$a=array("a"=>"red","b"=>"green"); array_unshift($a,"blue"); print_r($a); ?> |
18
|
Array_keys () |
The array_keys() function returns an array
containing the keys.
Syntax
Array_keys(array,value,strict)
Example
Return an array containing the keys:
<?php
$a=array("Volvo"=>"XC90","BMW"=>"X5","Toyota"=>"Innova"); print_r(array_keys($a)); ?> |
19
|
Array_key_exists()
|
|
The array_key_exists() function checks an array for
a specified key, and returns true if the key exists and false if the key does
not exist.
Syntax
array_key_exists(key,array)
Example
Check if the key
"Volvo" exists in an array:
<?php
$a=array("Volvo"=>"XC90","BMW"=>"X5"); if (array_key_exists("Volvo",$a)) { echo "Key exists!"; } else { echo "Key does not exist!"; } ?> |
||
20
|
Array_push () |
The array_push () function inserts one or more
elements to the end of an array.
Syntax
array_push(array,value1,value2...)
Example
Insert
"blue" and "yellow" to the end of an array:
<?php
$a=array("red","green"); array_push($a,"blue","yellow"); print_r($a); ?> |
21
|
array_pop() |
The array_pop() function deletes the last element of
an array.
Syntax
array_pop(array)
Example
Delete the last
element of an array:
<?php
$a=array("red","green","blue"); array_pop($a); print_r($a); ?> |
22
|
Array_multisort()
|
|
The array_multisort () function returns a sorted
array. You can assign one or more arrays. The function sorts the first array,
and the other arrays follow, then, if two or more values are the same, it
sorts the next array, and so on.
Syntax
Array_multisort(array1,sorting order,sorting
type,array2,array3...)
Example
Return a sorted
array in ascending order:
<?php
$a=array("Dog","Cat","Horse","Bear","Zebra"); array_multisort($a); print_r($a); ?> |
||
23
|
array_search() |
The array_search() function search an array for a
value and returns the key.
Syntax
array_search(value,array,strict)
Example
Search an array for the value "red" and
return its key:
<?php
$a=array("a"=>"red","b"=>"green","c"=>"blue"); echo array_search("red",$a); ?> |
24
|
array_merge() |
This function is used to merge one or more arrays.
Syntax
array array_merge(array1,array2,array……)
Array_merge merges the elements of one or more arrays together
so that the values of one are appended to the end of the previous one.
Example
<?php
$array1=array(“red”,”green”,”blue”);
$array2=array(“pink”,”brown”,”yellow”);
$result=array_merge($array1,$array2);
print_r($result);
?>
|
25
|
Array_reverse () |
It returns an array with elements in reverse order.
Syntax
array array_reverse(array values);
Array_reverse() takes input an array and returns a new array
with the order of the elements reversed.
Example
<?php
$input=array(“php”,4.0,”red”);
print_r(array_reverse($input));
?>
|
26
|
each() |
It returns the current key and value pair from an array.
Syntax:
each(array);
Example:
<?php
$foo=array(“red”,”green”,”blue”);
$bar=each($foo);
Print_r($bar)
?>
|
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