PHP Date Exercises : Number of the month before the current month

PHP date: Exercise-20 with Solution

Write a PHP script to get the number of the month before the current month.

Sample Solution:

PHP Code:

echo date('m', strtotime('-1 month'))."\n";

Sample Output:


N.B.: The result may varry for your system date and time.

PHP Code Editor:

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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