broadband speed

<?php
/*	
|--------------------------------------------------------------------------	
| Broadband Speed Class
|--------------------------------------------------------------------------
|
| This class allows you to parse a CSV file and return the average UK
| broadband speed. 
|
| https://data.gov.uk/dataset/broadband-coverage 
|
*/

class broadband 
{
	
	/**
	* search the array data and return the broadband
	* speed if it matches the serach term 
	*
	* @param string $searchTerm
	* @param string $csvFile
	* @return string
	*/
	public static function searchData($searchTerm, $csvFile)
	{
		$csvData = self::csv2array($csvFile);
		
		/* loop through every area */
		foreach($csvData as $key=>$value){
			$area  = $value[0];
			$speed = $value[1];
			
			/* check if the current area 
				matches our search term */
			if(stripos($area, $searchTerm) == true){
				return $speed;
			} 
		}
		
		return false;
		
	}	
	
	/**
	* return the csv file as an array
	* 
	* @param string $csvFile
	* @return array
	*/
	private static function csv2array($csvFile)
	{
		if(file_exists($csvFile))
		{
			return array_map('str_getcsv', file($csvFile));
		}
		
		return false;
	}
	
}

?>

<form method="post">
	<input type="text" name="area" placeholder="area">
	<input type="submit">
</form>

<?php
if(isset($_POST['area'])) 
	echo $_POST['area'] . ' - average speed is 
	' . broadband::searchData($_POST['area'],'data.csv') . 'mbps';
?>