﻿ PHP Math Exercise: Rounds the specified values with 1 decimal digit precision - w3resource # PHP Math Exercises: Rounds the specified values with 1 decimal digit precision

## PHP math: Exercise-2 with Solution

Write a PHP script which rounds the following values with 1 decimal digit precision.

Sample values :
1.65
1.65
-1.54

Pictorial Presentation: Sample Solution:

PHP Code:

``````<?php
echo round( 1.65, 1, PHP_ROUND_HALF_UP)."\n";   //  1.7
echo round( 1.65, 1, PHP_ROUND_HALF_DOWN)."\n"; //  1.6
echo round(-1.54, 1, PHP_ROUND_HALF_EVEN)."\n"; // -1.5
?>
```
```

Sample Output:

```1.7
1.6
-1.5
```

Flowchart : 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