Please refer to the table in the dreamhome database. If the connection is successful and we run the following PHP codes on obi.kean.edu, which statement. is TRUE? 1 Cannot connect to DB\n"); 5 $query = "SELECT fname from dreamhome. Staff where sex= 'FF' and salary > 20000"; 6 $result = mysqli_query($con, $query); 7 if($result) { 8 9 10 11 if (mysqli_num_rows($result)>0) echo "Monkey\n"; else echo "Tiger\n"; 12} 13 else 14 15 16 mysqli_close($con); 17 ?> echo "Dog\n";
Please refer to the table in the dreamhome database. If the connection is successful and we run the following PHP codes on obi.kean.edu, which statement. is TRUE? 1 Cannot connect to DB\n"); 5 $query = "SELECT fname from dreamhome. Staff where sex= 'FF' and salary > 20000"; 6 $result = mysqli_query($con, $query); 7 if($result) { 8 9 10 11 if (mysqli_num_rows($result)>0) echo "Monkey\n"; else echo "Tiger\n"; 12} 13 else 14 15 16 mysqli_close($con); 17 ?> echo "Dog\n";
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
Related questions
Question
![The PHP script shown is designed to connect to a MySQL database and execute a query. Below is a line-by-line explanation of the code:
1. `<?php`: Begins the PHP script.
2. `include "dbconfig.php";`: Includes the content of the `dbconfig.php` file, which typically contains database configuration details such as hostname, username, password, and database name.
3. `$con=mysqli_connect($hostname,$username,$password,$dbname)`: Establishes a connection to the MySQL database using variables defined in `dbconfig.php`.
4. `or die("<br>Cannot connect to DB\n");`: If the connection fails, the script stops executing and outputs "Cannot connect to DB."
5. `$query = "SELECT fname from dreamhome.Staff where sex='FF' and salary > 20000";`: Defines an SQL query to select the first name from the `Staff` table in the `dreamhome` database where the sex is 'FF' (female) and the salary is greater than 20000.
6. `$result = mysqli_query($con,$query);`: Sends the SQL query to the database and stores the result.
7. `if($result) {`: Checks if the query execution was successful.
8. `if (mysqli_num_rows($result)>0)`: Checks if the query returned any rows.
9. `echo "Monkey\n";`: If rows are returned, it outputs "Monkey."
10. `else`: If no rows are returned from the query,
11. `echo "Tiger\n";`: It outputs "Tiger."
12. `}`: Closes the first `if` block.
13. `else`: If the query execution fails,
14. `echo "Dog\n";`: It outputs "Dog."
15. `}`: Closes the `else` block.
16. `mysqli_close($con);`: Closes the database connection.
17. `?>`: Ends the PHP script.
### Explanation
- The code first attempts to connect to the database.
- If successful, it queries to find any female staff with a salary greater than 20000.
- If such records are found, it outputs "Monkey."
- If no such records are found, it outputs "Tiger."
- If the query itself fails, it outputs "Dog."
This code tests basic database connectivity and query execution, displaying different strings based on the success of each operation.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F2ec814c7-90f3-4435-9bb8-fcbab3f733ac%2Fe451d44f-aa24-423f-a3a2-69080dbee8c0%2Fx4r6vtf_processed.png&w=3840&q=75)
Transcribed Image Text:The PHP script shown is designed to connect to a MySQL database and execute a query. Below is a line-by-line explanation of the code:
1. `<?php`: Begins the PHP script.
2. `include "dbconfig.php";`: Includes the content of the `dbconfig.php` file, which typically contains database configuration details such as hostname, username, password, and database name.
3. `$con=mysqli_connect($hostname,$username,$password,$dbname)`: Establishes a connection to the MySQL database using variables defined in `dbconfig.php`.
4. `or die("<br>Cannot connect to DB\n");`: If the connection fails, the script stops executing and outputs "Cannot connect to DB."
5. `$query = "SELECT fname from dreamhome.Staff where sex='FF' and salary > 20000";`: Defines an SQL query to select the first name from the `Staff` table in the `dreamhome` database where the sex is 'FF' (female) and the salary is greater than 20000.
6. `$result = mysqli_query($con,$query);`: Sends the SQL query to the database and stores the result.
7. `if($result) {`: Checks if the query execution was successful.
8. `if (mysqli_num_rows($result)>0)`: Checks if the query returned any rows.
9. `echo "Monkey\n";`: If rows are returned, it outputs "Monkey."
10. `else`: If no rows are returned from the query,
11. `echo "Tiger\n";`: It outputs "Tiger."
12. `}`: Closes the first `if` block.
13. `else`: If the query execution fails,
14. `echo "Dog\n";`: It outputs "Dog."
15. `}`: Closes the `else` block.
16. `mysqli_close($con);`: Closes the database connection.
17. `?>`: Ends the PHP script.
### Explanation
- The code first attempts to connect to the database.
- If successful, it queries to find any female staff with a salary greater than 20000.
- If such records are found, it outputs "Monkey."
- If no such records are found, it outputs "Tiger."
- If the query itself fails, it outputs "Dog."
This code tests basic database connectivity and query execution, displaying different strings based on the success of each operation.
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