I just started learning PHP. How to find and print the longest word in a PHP array

Question

$array =array("AB","ABC","ABCD","ABCDE","BD");

Requirement: find the longest element in the array

Output:ABCDE

Answer 1

$array =array("AB","ABC","ABCD","ABCDE","BD");

$longstring = $array[0];
foreach( $array as $string ) {
if ( strlen( $string ) > strlen( $longstring ) ) {
$longstring = $string;
    }
}

echo $longstring;

Answer 2

First we are iterate the array with help of foreach loop. in foreach loop we check $result is less than array value. if array value is greater then $result array then we override previous value of $result with new value. if we found greatest length than previous array element then we are storing new length & key of new element in variable.

   $array =array("AB","ABC","ABCD","ABCDE","BD"); 
    $result = $resultkey = 0;
    foreach($array as $key=>$value) {

        if($result < strlen($value) ) {
            $result = strlen($value);
            $resultkey = $key;
        }
    }
    echo 'longest value:' $result;
    echo 'result :'   $array[$resultkey]

Output:

longest value:  5
result :ABCDE

Answer 3

Try this, though it's a bit confusing.

<?php //php 7.0.8

$array = array("AB","ABC","ABCD","ABCDE","BD");

$longertext = array_search(max($array), $array)-1; //4-1 =3

// minus 1 because it's counting the actual position not starts with 0 it returns 4

echo $longertext;  //equals 3
echo "\n";
echo $array[$longertext];  //equals  ABCDE

?>

The actual test: http://rextester.com/OTI23127

Answer 4

You could sort the array by string length using strlen and usort and get the first item:

$array =array("AB","ABC","ABCD","ABCDE","BD");
usort($array, function($x, $y) { return strlen($y)-strlen($x); });
echo $array[0];

Result:

ABCDE

Demo