array_search(): searching for value inside

This function Searches for presence of a input value.
bool = array_search ($search, $input_array,$strict);
$search : Required , value to search inside the $input_array.
$input_array : Required , array inside which the value will be searched.
$strict :Optional : If set to TRUE then strict type comparison is performed.

Output is the corresponding key if value is found inside array , otherwise FALSE.
arra_search() returns the key of first occurance of the value, to get the keys of all the matching values we can use array_keys() function

Example 1

$input=array(1,2,3,4);

if(array_search(2,$input)){
echo "Value is available ";	
}else{
echo "Value is NOT available ";	
}
Output is here.
Value is available

Example 2

$input=array('One' =>1,'Two'=>2,'Three'=>3,'Four'=>'Fourth');

if(array_search('Three',$input)){
echo "Value is available ";	
}else{
echo "Value is NOT available ";	
}
Output is here.
Value is available

Example 3 , returning the matching key

$input=array('One' =>'First','Two'=>'Second','Three'=>'Third','Fourth');

$search_string='Third'; // Change this value
if(array_search($search_string,$input)){
echo "Value <i>$search_string</i> is available inside array<br>";	
echo "Marching Key is : ".array_search($search_string,$input);
}else{
echo "Value <i>$search_string</i> is NOT available inside array <br>";	
}
Output is here
Value Third is available inside array
Marching Key is : Three
FunctionDetails
in_array()Search for value inside Array. Returns TRUE or FALSE
array_key_exists()Returns TEUE if key is found inside, FALSE otherwise
array_keys()Array of keys for matching values, FALSE otherwise


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