PHP | mysqli_stmt_bind_param() Function

PHP mysqli_stmt_bind_param() 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_stmt_bind_param() Function.

The mysqli_stmt_bind_param() function is used for binding variables to the parameter markers of a prepared statement.

Syntax

Following below is the syntax to use this function -

mysqli_stmt_bind_param($stmt, $types, $var1, $var2...);


Parameter Details

Sr.NoParameter & Description
1

stmt(Mandatory)

This is an object representing a prepared statement.

2

types(Mandatory)

A string (of individual characters) specifying the types of the variables where −

  • i represents an integer type

  • d represents an double type

  • s represents an string type

  • b represents an blob type

3

var(Mandatory)

Values for the variables, separated by commas.


Return Value

This built-in PHP function returns TRUE on success and FALSE on failure.

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 PHP mysqli_stmt_bind_param() function (in a procedural style) -

<?php
   //Creating a connection
   $con = new mysqli("localhost", "root", "password", "mydb");

   //Creating a table
   $con -> query("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");

   //Inserting values into the table using prepared statement
   $stmt = $con -> prepare( "INSERT INTO myplayers values(?, ?, ?, ?, ?)");

   //Binding values to the parameter markers
   $stmt -> bind_param("issss", $id, $fname, $lname, $pob, $country);
   $id = 1;
   $fname = 'Kennedy';
   $lname = 'Nkpara';
   $pob = 'PortHarcourt';
   $country = 'Nigeria';

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

Example2

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

<?php
   //Creating a connection
   $con = new mysqli("localhost", "root", "password", "mydb");

   //Creating a table
   $con -> query("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");

   //Inserting values into the table using prepared statement
   $stmt = $con -> prepare( "INSERT INTO myplayers values(?, ?, ?, ?, ?)");

   //Binding values to the parameter markers
   $stmt -> bind_param("issss", $id, $fname, $lname, $pob, $country);
   $id = 1;
   $fname = 'Kennedy';
   $lname = 'Nkpara';
   $pob = 'PortHarcourt';
   $country = 'Nigeria';

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

   //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.....

Example3

Following is another example of the built-in PHP mysqli_stmt_bind_param() Function -

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

   mysqli_query($con, "CREATE TABLE Test(Name VARCHAR(255), AGE INT)");
   print("Table Created.....\n");
   mysqli_query($con, "insert into Test values('Kennedy', 27),('Paul', 30),('Justice', 28)");
   print("Records Inserted.....\n");

   $stmt = mysqli_prepare($con, "DELETE FROM test where Age<?");
   mysqli_stmt_bind_param($stmt, "i", $num);
   $num = 28;
   //Executing the statement
   mysqli_stmt_execute($stmt);

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

Output

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

Table Created.....


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 PHP mysqli_stmt_bind_result() Function.

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