mysqli_fetch_lengths() : field length

<?Php
require "config.php";// Database connection file.

$query="select * from student where id=7 ";
if ($result_set = mysqli_query($connection,$query)) {
	 $row = mysqli_fetch_row($result_set);
echo $row[1]."<br>";
foreach (mysqli_fetch_lengths($result_set) as $i => $val) {
	echo " Field No ". $i ." value: ".$val . ",";
  }   
}
?>

Krish Star
Field No 0 value: 1, Field No 1 value: 10, Field No 2 value: 4, 
Field No 3 value: 2, Field No 4 value: 6,

$result_set->lengths;

mysqli_fetch_lengths

MySQLI database connection file

MySQL SELECT Query

<?Php
require "config.php";// Database connection file.
$q="SELECT * FROM student where id=4";
if ($result = $connection->query($q)){
    
$row = $result->fetch_row();

echo $row[1]."<br>";
  foreach ($result->lengths as $i => $val) {
   echo " Field No ". $i ." value: ".$val . ",";
  }
	
 $result->close();
}
?>

Getting field length of all records

<?Php
require "config.php";// Database connection,returns the object $connection
$query='SELECT * FROM student';
if ($result = $connection->query($query)) {
    while ($row = $result->fetch_assoc()) {
  echo "<br><br><b>".$row['id'],$row['name'],$row['class'].$row['mark']."</b>";
      foreach ($result->lengths as $i => $val) {
        printf("<br>Field %2d has Length %2d\n", $i+1, $val);
      }
  }
}
?>

<?Php
require "config.php";// Database connection,returns the object $connection
$query='SELECT * FROM student';
if ($result = mysqli_query($connection, $query)) {
while ($row = mysqli_fetch_assoc($result)) {
  echo "<br><br><b>".$row['id'],$row['name'],$row['class'].$row['mark']."</b>";
    /* display column lengths */
    foreach (mysqli_fetch_lengths($result) as $i => $val) {
      printf("<br>Field %2d has Length %2d\n", $i+1, $val);
    }
}
}
?>

1John DeoFour75
Field 1 has Length 1
Field 2 has Length 8
Field 3 has Length 4
Field 4 has Length 2
Field 5 has Length 6

2Max RuinThree85
Field 1 has Length 1
Field 2 has Length 8
Field 3 has Length 5
Field 4 has Length 2
Field 5 has Length 4

3ArnoldThree55
Field 1 has Length 1
Field 2 has Length 6
Field 3 has Length 5
Field 4 has Length 2
Field 5 has Length 4
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MySQL DUMP of student table