PHP | mysqli_fetch_fields() Function

PHP mysqli_fetch_fields() Function


Hello folks! welcome back to a new edition of our tutorial on PHP. In this tutorial guide, we are going to be studying about the PHP mysqli_fetch_fields() Function.

The mysqli_fetch_fields() function accepts a result object as a parameter, and returns an array of objects with each representing a field in result.

Syntax

Following below is the syntax to use this function -

mysqli_fetch_fields($result);


Parameter Details

Sr.NoParameter & Description
1

result(Mandatory)

This is an identifier representing a result object.


Return Value

This built-in PHP function returns an array of object where each of the object contains definition information of a field in the given result. This built-in function returns false in case of no information.

The object returned contains the following properties $minus;

  • name
  • orgname
  • table
  • orgtable
  • length
  • max_length
  • flags
  • charsetnr
  • decimals
  • type

PHP Version

This PHP function was first introduced in PHP version 5 and works in all the later versions.

Example1

The following below is an example which demonstrates the usage of the built-in PHP mysqli_fetch_fields() function (in a procedural style) -

<?php
   $con = mysqli_connect("localhost", "root", "password", "mydb");

   mysqli_query($con, "CREATE TABLE myplayers(ID INT, First_Name VARCHAR(255), Last_Name VARCHAR(255), Place_Of_Birth VARCHAR(255), Country VARCHAR(255))");
   print("Table Created.....\n");
   mysqli_query($con, "INSERT INTO myplayers values(1, 'Kennedy', 'Nkpara', 'PortHarcourt', 'Nigeria')");
   mysqli_query($con, "INSERT INTO myplayers values(2, 'Jonathan', 'Trott', 'CapeTown', 'SouthAfrica')");
   mysqli_query($con, "INSERT INTO myplayers values(3, 'Queen', 'Douglas', 'Texas', 'UnitedStates')");
   print("Record Inserted.....\n");

   //Retrieving the contents of the table
   $res = mysqli_query($con, "SELECT * FROM myplayers");

   //Fetching all the fields
   $info = mysqli_fetch_fields($res);
   foreach ($info as $ele) {
      print("ID: ".$ele->name."\n");
      print("First_Name: ".$ele->table."\n");
      print("Last_Name: ".$ele->max_length."\n");
      print("Place_Of_Birth: ".$ele->charsetnr."\n");
      print("Country: ".$ele->flags."\n");
      print("Country: ".$ele->type."\n");
      print("\n");
   }
   //Closing the statement
   mysqli_free_result($res);

   //Closing the connection
   mysqli_close($con);
?>

Output

When the above code is executed, it will produce the following result -

Table Created.....
Record Inserted.....
ID: ID
First_Name: myplayers
Last_Name: 1
Place_Of_Birth: 63
Country: 32768
Country: 3

ID: First_Name
First_Name: myplayers
Last_Name: 8
Place_Of_Birth: 33
Country: 0
Country: 253

ID: Last_Name
First_Name: myplayers
Last_Name: 10
Place_Of_Birth: 33
Country: 0
Country: 253

ID: Place_Of_Birth
First_Name: myplayers
Last_Name: 8
Place_Of_Birth: 33
Country: 0
Country: 253

ID: Country
First_Name: myplayers
Last_Name: 11
Place_Of_Birth: 33
Country: 0
Country: 253

Example2

In an object oriented style the syntax of this function is $result->fetch_fields(); Following is the example of this function in an object oriented style -

<?php
   //Creating a connection
   $con = new mysqli("localhost", "root", "password", "mydb");
 
   $con -> query("CREATE TABLE Test(Name VARCHAR(255), Age INT)");
   $con -> query("insert into Test values('Kennedy', 27),('Paul', 30),('Justice', 28)");
   print("Table Created.....\n");

   $stmt = $con -> prepare( "SELECT * FROM Test WHERE Name in(?, ?)");
   $stmt -> bind_param("ss", $name1, $name2);
   $name1 = 'Kennedy';
   $name2 = 'Paul';

   //Executing the statement
   $stmt->execute();

   //Retrieving the result
   $result = $stmt->get_result();

   //Fetching all the rows as arrays
   $info = $result->fetch_fields();
   foreach ($info as $ele) {
      print("ID: ".$ele->name."\n");
      print("First_Name: ".$ele->table."\n");
      print("Last_Name: ".$ele->max_length."\n");
      print("Place_Of_Birth: ".$ele->charsetnr."\n");
      print("Country: ".$ele->flags."\n");
      print("Country: ".$ele->type."\n");
      print("\n");
   }
   //Closing the statement
   $stmt->close();

   //Closing the connection
   $con->close();
?>


Alright guys! This is where we are going to be rounding up for this tutorial post. In our next tutorial, we are going to be discussing about the mysqli_fetch_lengths() Function in PHP.

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