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_stmt_result_metadata() Function.
The PHP mysqli_stmt_result_metadata() function accepts a prepared statement object as a parameter and, if the given executes a SELECT query (or any other query that returns resultset), this function returns a metadata object which contains information about the resultset of the given statement.
The PHP mysqli_stmt_result_metadata() function accepts a prepared statement object as a parameter and, if the given executes a SELECT query (or any other query that returns resultset), this function returns a metadata object which contains information about the resultset of the given statement.
Syntax
Following below is the syntax to use this function -
mysqli_stmt_result_metadata($stmt);
Parameter Details
Sr.No | Parameter & Description |
---|---|
1 | stmt(Mandatory) This is an object representing a prepared statement. |
Return Value
This function returns a metadata object on success and FALSE on failure.
PHP Version
This built-in 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_stmt_result_metadata() function (in a procedural style) -
<?php $con = mysqli_connect("localhost", "root", "password", "mydb"); mysqli_query($con, "CREATE TABLE test(Name VARCHAR(255), age INT)"); mysqli_query($con, "INSERT INTO test values('Kennedy', 27)"); mysqli_query($con, "INSERT INTO test values('Paul', 30)"); print("Table Created.....\n"); //Retrieving the contents of the table $stmt = mysqli_prepare($con, "SELECT * FROM test"); //Executing the statement mysqli_stmt_execute($stmt); //Retrieving the resultset metadata $metadata = mysqli_stmt_result_metadata($stmt); print_r(mysqli_fetch_fields($metadata)); mysqli_free_result($metadata); //Closing the connection mysqli_close($con); ?>
Output
When the above code is executed, it will produce the following result -
Table Created..... Array ( [0] => stdClass Object ( [name] => Name [orgname] => Name [table] => test [orgtable] => test [def] => [db] => mydb [catalog] => def [max_length] => 0 [length] => 765 [charsetnr] => 33 [flags] => 0 [type] => 253 [decimals] => 0 ) [1] => stdClass Object ( [name] => AGE [orgname] => AGE [table] => test [orgtable] => test [def] => [db] => mydb [catalog] => def [max_length] => 0 [length] => 11 [charsetnr] => 63 [flags] => 32768 [type] => 3 [decimals] => 0 ) )
Example2
In an object oriented style the syntax of this built-in function is $stmt->result_metadata(); 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'; print("Records Inserted.....\n"); //Executing the statement $stmt->execute(); //Retrieving the resultset metadata $metadata = $stmt->result_metadata(); $field = $metadata->fetch_field(); print("Field Name: ".$field->name); //Closing the statement $stmt->close(); //Closing the connection $con->close(); ?>
Output
When the above code is executed, it will produce the following result -
Table Created..... Record Inserted..... Field Name: Name
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_stmt_send_long_data() Function in PHP.
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