PHP array function sequence in_array() finds whether an array value exists

PHP array function sequence in_array() finds whether an array value exists_PHP tutorial

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Release： 2016-07-21 15:23:18

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in_array() Definition and Usage
The in_array() function searches an array for a given value.

Syntax
in_array(value,array,type)
Parameter Description
value Required. Specifies the value to search for in the array.
array required. Specifies the array to search.
type optional. If this parameter is set to true, it is checked whether the type of the searched data and the value of the array are the same.

Description
Returns true if the given value value exists in the array array. If the third parameter is set to true, the function returns true only if the element exists in the array and has the same data type as the given value.

If the parameter is not found in the array, the function returns false.

Note: If the value parameter is a string and the type parameter is set to true, the search is case-sensitive.

Example 1

Copy code The code is as follows:

 
$people = array("Peter", "Joe", "Glenn", "Cleveland"); 

if (in_array("Glenn",$people)) 
{ 
echo "Match found"; 
} 
else 
{ 
echo "Match not found"; 
} 
?> 

Output:

Match found
Example 2

Copy code The code is as follows:

 
$people = array( "Peter", "Joe", "Glenn", "Cleveland", 23); 

if (in_array("23",$people, TRUE)) 
{ 
echo "Match found< ;br />"; 
} 
else 
{ 
echo "Match not found
"; 
}if (in_array("Glenn",$people, TRUE )) 
{ 
echo "Match found
"; 
} 
else 
{ 
echo "Match not found
"; 
 }if (in_array(23,$people, TRUE)) 
{ 
echo "Match found
"; 
} 
else 
{ 
echo "Match not found
"; 
} 
?> 