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PHP Math Exercises: Convert Arabic numbers to Roman numerals

PHP math: Exercise-9 with Solution

Write a PHP function to convert Arabic numbers to Roman numerals.

Pictorial Presentation:

PHP Math Exercises: Convert Arabic numbers to Roman numerals

Sample Solution:

PHP Code:

<?php
function arabic_rome($num)
{ 
$c='IVXLCDM'; 
for($x=5,$y=$result='';$num;$y++,$x^=7) 
for($o=$num%$x,$num=$num/$x^0;$o--;$result=$c[$o>2?$y+$num-($num=-2)+$o=1:$y].$result); 
return $result; 
} 
print_r(arabic_rome(101)."\n");
?>

Sample Output:

CI

Flowchart :

Flowchart: Convert Arabic numbers to Roman numerals

PHP Code Editor:

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Previous: Write a PHP function to round a float away from zero to a specified number of decimal places.
Next: Write a PHP function to get random float numbers.

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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