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PHP Class Exercises: An introductory message as an argument value of the method within the class

PHP class: Exercise-2 with Solution

Write a simple PHP class which displays an introductory message like "Hello All, I am Scott", where "Scott" is an argument value of the method within the class.

Sample Solution:

PHP Code:

<?php
class user_message {
 public $message = 'Hello All, I am ';
 public function introduce($name)
 {
  return $this->message.$name;
 }
 }
$mymessage = New user_message();
echo $mymessage->introduce('Scott')."\n";
?>

Sample Output: 

Hello All, I am Scott

Flowchart :

Flowchart: An introductory message as an argument value of the method within the class

PHP Code Editor:

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Previous: Write a simple PHP class which displays the specified string.
Next: Write a PHP class that calculates the factorial of an integer.

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PHP: Tips of the Day

SQL injection that gets around mysql_real_escape_string()

Consider the following query:

$iId = mysql_real_escape_string("1 OR 1=1");    
$sSql = "SELECT * FROM table WHERE id = $iId";

mysql_real_escape_string() will not protect you against this. The fact that you use single quotes (' ') around your variables inside your query is what protects you against this. The following is also an option:

$iId = (int)"1 OR 1=1";
$sSql = "SELECT * FROM table WHERE id = $iId";

Ref : https://bit.ly/32q3bJ7