Extract all email address from any text content removing duplicated, and exporting as TEXT, SQL or CSV

emailXtractor.php

<?php
/**
 *
 * Extract all email address from any text content removing duplicated
 * Return string formated as: TEXT, SQL or CSV
 * @author Alexander Garzon
 *
 */
class emailXtractor {

	function __construct($file, $format = 'txt', $tablename = 'emailmass'){

		$clean = $this->removeDuplicated($this->extract(file_get_contents($file)));
		header('Content-Type: text/plain');
		switch ($format){
			case 'txt' : echo $this->exportTxt($clean); break;
			case 'sql' : echo $this->exportSql($clean, $tablename); break;
			case 'csv' : echo $this->exportcsv($clean); break;
		}
	}

	protected function extract($content) {
		$regexp = '/([a-z0-9_\.\-])+\@(([a-z0-9\-])+\.)+([a-z0-9]{2,4})+/i';
		preg_match_all($regexp, $content, $m);
		return isset($m[0]) ? $m[0] : array ();
	}

	protected function removeDuplicated($array){
		return array_map('strtolower', array_unique($array));
	}

	protected function exportCsv($array){
		foreach($array as $value){
			$csv .= '"null","'. $value . '","null"' . PHP_EOL;
		}
		return $csv;
	}

	protected function exportSql($array, $tablename){
			$sql = '';
		foreach($array as $value){
			$sql .= "INSERT IGNORE INTO $tablename VALUES (NULL, '$value', '0');" . PHP_EOL;
		}
		return $sql;
	}

	protected function exportTxt($array){
		foreach($array as $value){
			$txt .= $value . PHP_EOL;
		}
		return $txt;
	}
}

new emailXtractor('emailmass2.xml', 'sql', 'emailmass3');

if (($handle = fopen( $file, 'r')) !== false){
    return fread($handle, filesize($file));
}

can be replaced with

file_get_contents($file);

However, I would rather see you use the file socket handles to read in chunks at a time.

You're right. Changing ;)

Bro but how do I convert his youtube id to
Gmail .

There is all the details but no gmail