Warning: Duplicate entry '0' for key 'PRIMARY' query: INSERT INTO watchdog (uid, type, message, severity, link, location, referer, hostname, timestamp) VALUES (0, 'php', '<em>Function ereg() is deprecated</em> in <em>/home/mwkoh/twit88.com/home/includes/file.inc</em> on line <em>647</em>.', 2, '', 'https://twit88.com/home/node/26', 'https://twit88.com/home/popular/alltime', '207.241.237.225', 1461299876) in /home/mwkoh/twit88.com/home/includes/database.mysql.inc on line 172

Warning: Duplicate entry '0' for key 'PRIMARY' query: INSERT INTO watchdog (uid, type, message, severity, link, location, referer, hostname, timestamp) VALUES (0, 'php', '<em>Function ereg() is deprecated</em> in <em>/home/mwkoh/twit88.com/home/includes/file.inc</em> on line <em>647</em>.', 2, '', 'https://twit88.com/home/node/26', 'https://twit88.com/home/popular/alltime', '207.241.237.225', 1461299876) in /home/mwkoh/twit88.com/home/includes/database.mysql.inc on line 172

Warning: Duplicate entry '0' for key 'PRIMARY' query: INSERT INTO watchdog (uid, type, message, severity, link, location, referer, hostname, timestamp) VALUES (0, 'php', '<em>Function ereg() is deprecated</em> in <em>/home/mwkoh/twit88.com/home/includes/file.inc</em> on line <em>647</em>.', 2, '', 'https://twit88.com/home/node/26', 'https://twit88.com/home/popular/alltime', '207.241.237.225', 1461299876) in /home/mwkoh/twit88.com/home/includes/database.mysql.inc on line 172

Warning: Duplicate entry '0' for key 'PRIMARY' query: INSERT INTO watchdog (uid, type, message, severity, link, location, referer, hostname, timestamp) VALUES (0, 'php', '<em>Function ereg() is deprecated</em> in <em>/home/mwkoh/twit88.com/home/includes/file.inc</em> on line <em>647</em>.', 2, '', 'https://twit88.com/home/node/26', 'https://twit88.com/home/popular/alltime', '207.241.237.225', 1461299876) in /home/mwkoh/twit88.com/home/includes/database.mysql.inc on line 172

Warning: Duplicate entry '0' for key 'PRIMARY' query: INSERT INTO watchdog (uid, type, message, severity, link, location, referer, hostname, timestamp) VALUES (0, 'php', '<em>Function ereg() is deprecated</em> in <em>/home/mwkoh/twit88.com/home/includes/file.inc</em> on line <em>647</em>.', 2, '', 'https://twit88.com/home/node/26', 'https://twit88.com/home/popular/alltime', '207.241.237.225', 1461299876) in /home/mwkoh/twit88.com/home/includes/database.mysql.inc on line 172

Warning: Duplicate entry '0' for key 'PRIMARY' query: INSERT INTO watchdog (uid, type, message, severity, link, location, referer, hostname, timestamp) VALUES (0, 'php', '<em>Function ereg() is deprecated</em> in <em>/home/mwkoh/twit88.com/home/includes/file.inc</em> on line <em>647</em>.', 2, '', 'https://twit88.com/home/node/26', 'https://twit88.com/home/popular/alltime', '207.241.237.225', 1461299876) in /home/mwkoh/twit88.com/home/includes/database.mysql.inc on line 172

Warning: Duplicate entry '0' for key 'PRIMARY' query: INSERT INTO watchdog (uid, type, message, severity, link, location, referer, hostname, timestamp) VALUES (0, 'php', '<em>Function ereg() is deprecated</em> in <em>/home/mwkoh/twit88.com/home/includes/file.inc</em> on line <em>647</em>.', 2, '', 'https://twit88.com/home/node/26', 'https://twit88.com/home/popular/alltime', '207.241.237.225', 1461299876) in /home/mwkoh/twit88.com/home/includes/database.mysql.inc on line 172

Warning: Duplicate entry '0' for key 'PRIMARY' query: INSERT INTO watchdog (uid, type, message, severity, link, location, referer, hostname, timestamp) VALUES (0, 'php', '<em>Function ereg() is deprecated</em> in <em>/home/mwkoh/twit88.com/home/includes/file.inc</em> on line <em>647</em>.', 2, '', 'https://twit88.com/home/node/26', 'https://twit88.com/home/popular/alltime', '207.241.237.225', 1461299876) in /home/mwkoh/twit88.com/home/includes/database.mysql.inc on line 172

Warning: Duplicate entry '0' for key 'PRIMARY' query: INSERT INTO watchdog (uid, type, message, severity, link, location, referer, hostname, timestamp) VALUES (0, 'php', '<em>Only variables should be assigned by reference</em> in <em>/home/mwkoh/twit88.com/home/modules/links/links_related.module</em> on line <em>204</em>.', 2, '', 'https://twit88.com/home/node/26', 'https://twit88.com/home/popular/alltime', '207.241.237.225', 1461299876) in /home/mwkoh/twit88.com/home/includes/database.mysql.inc on line 172

Warning: Duplicate entry '0' for key 'PRIMARY' query: INSERT INTO watchdog (uid, type, message, severity, link, location, referer, hostname, timestamp) VALUES (0, 'php', '<em>Only variables should be assigned by reference</em> in <em>/home/mwkoh/twit88.com/home/modules/links/links_related.module</em> on line <em>426</em>.', 2, '', 'https://twit88.com/home/node/26', 'https://twit88.com/home/popular/alltime', '207.241.237.225', 1461299876) in /home/mwkoh/twit88.com/home/includes/database.mysql.inc on line 172

Warning: Duplicate entry '0' for key 'PRIMARY' query: INSERT INTO watchdog (uid, type, message, severity, link, location, referer, hostname, timestamp) VALUES (0, 'php', '<em>Only variables should be assigned by reference</em> in <em>/home/mwkoh/twit88.com/home/modules/links/links.inc</em> on line <em>1121</em>.', 2, '', 'https://twit88.com/home/node/26', 'https://twit88.com/home/popular/alltime', '207.241.237.225', 1461299876) in /home/mwkoh/twit88.com/home/includes/database.mysql.inc on line 172

Warning: Duplicate entry '0' for key 'PRIMARY' query: INSERT INTO watchdog (uid, type, message, severity, link, location, referer, hostname, timestamp) VALUES (0, 'php', '<em>Only variables should be assigned by reference</em> in <em>/home/mwkoh/twit88.com/home/modules/links/links.inc</em> on line <em>1121</em>.', 2, '', 'https://twit88.com/home/node/26', 'https://twit88.com/home/popular/alltime', '207.241.237.225', 1461299876) in /home/mwkoh/twit88.com/home/includes/database.mysql.inc on line 172

Warning: Duplicate entry '0' for key 'PRIMARY' query: INSERT INTO watchdog (uid, type, message, severity, link, location, referer, hostname, timestamp) VALUES (0, 'php', '<em>Function ereg() is deprecated</em> in <em>/home/mwkoh/twit88.com/home/includes/file.inc</em> on line <em>647</em>.', 2, '', 'https://twit88.com/home/node/26', 'https://twit88.com/home/popular/alltime', '207.241.237.225', 1461299876) in /home/mwkoh/twit88.com/home/includes/database.mysql.inc on line 172

Warning: Duplicate entry '0' for key 'PRIMARY' query: INSERT INTO watchdog (uid, type, message, severity, link, location, referer, hostname, timestamp) VALUES (0, 'php', '<em>Function ereg() is deprecated</em> in <em>/home/mwkoh/twit88.com/home/includes/file.inc</em> on line <em>647</em>.', 2, '', 'https://twit88.com/home/node/26', 'https://twit88.com/home/popular/alltime', '207.241.237.225', 1461299876) in /home/mwkoh/twit88.com/home/includes/database.mysql.inc on line 172

Warning: Duplicate entry '0' for key 'PRIMARY' query: INSERT INTO watchdog (uid, type, message, severity, link, location, referer, hostname, timestamp) VALUES (0, 'php', '<em>Function ereg() is deprecated</em> in <em>/home/mwkoh/twit88.com/home/includes/file.inc</em> on line <em>647</em>.', 2, '', 'https://twit88.com/home/node/26', 'https://twit88.com/home/popular/alltime', '207.241.237.225', 1461299876) in /home/mwkoh/twit88.com/home/includes/database.mysql.inc on line 172

Warning: Duplicate entry '0' for key 'PRIMARY' query: INSERT INTO watchdog (uid, type, message, severity, link, location, referer, hostname, timestamp) VALUES (0, 'php', '<em>Function ereg() is deprecated</em> in <em>/home/mwkoh/twit88.com/home/includes/file.inc</em> on line <em>647</em>.', 2, '', 'https://twit88.com/home/node/26', 'https://twit88.com/home/popular/alltime', '207.241.237.225', 1461299876) in /home/mwkoh/twit88.com/home/includes/database.mysql.inc on line 172

Warning: Duplicate entry '0' for key 'PRIMARY' query: INSERT INTO watchdog (uid, type, message, severity, link, location, referer, hostname, timestamp) VALUES (0, 'php', '<em>Function ereg() is deprecated</em> in <em>/home/mwkoh/twit88.com/home/includes/file.inc</em> on line <em>647</em>.', 2, '', 'https://twit88.com/home/node/26', 'https://twit88.com/home/popular/alltime', '207.241.237.225', 1461299876) in /home/mwkoh/twit88.com/home/includes/database.mysql.inc on line 172

Warning: Duplicate entry '0' for key 'PRIMARY' query: INSERT INTO watchdog (uid, type, message, severity, link, location, referer, hostname, timestamp) VALUES (0, 'php', '<em>Function ereg() is deprecated</em> in <em>/home/mwkoh/twit88.com/home/includes/file.inc</em> on line <em>647</em>.', 2, '', 'https://twit88.com/home/node/26', 'https://twit88.com/home/popular/alltime', '207.241.237.225', 1461299876) in /home/mwkoh/twit88.com/home/includes/database.mysql.inc on line 172

Warning: Duplicate entry '0' for key 'PRIMARY' query: INSERT INTO watchdog (uid, type, message, severity, link, location, referer, hostname, timestamp) VALUES (0, 'php', '<em>Function ereg() is deprecated</em> in <em>/home/mwkoh/twit88.com/home/includes/file.inc</em> on line <em>647</em>.', 2, '', 'https://twit88.com/home/node/26', 'https://twit88.com/home/popular/alltime', '207.241.237.225', 1461299876) in /home/mwkoh/twit88.com/home/includes/database.mysql.inc on line 172

Warning: Duplicate entry '0' for key 'PRIMARY' query: INSERT INTO watchdog (uid, type, message, severity, link, location, referer, hostname, timestamp) VALUES (0, 'php', '<em>Function ereg() is deprecated</em> in <em>/home/mwkoh/twit88.com/home/includes/file.inc</em> on line <em>647</em>.', 2, '', 'https://twit88.com/home/node/26', 'https://twit88.com/home/popular/alltime', '207.241.237.225', 1461299876) in /home/mwkoh/twit88.com/home/includes/database.mysql.inc on line 172

Warning: Duplicate entry '0' for key 'PRIMARY' query: INSERT INTO watchdog (uid, type, message, severity, link, location, referer, hostname, timestamp) VALUES (0, 'php', '<em>Function ereg() is deprecated</em> in <em>/home/mwkoh/twit88.com/home/includes/file.inc</em> on line <em>647</em>.', 2, '', 'https://twit88.com/home/node/26', 'https://twit88.com/home/popular/alltime', '207.241.237.225', 1461299876) in /home/mwkoh/twit88.com/home/includes/database.mysql.inc on line 172

Warning: Duplicate entry '0' for key 'PRIMARY' query: INSERT INTO watchdog (uid, type, message, severity, link, location, referer, hostname, timestamp) VALUES (0, 'php', '<em>Function ereg() is deprecated</em> in <em>/home/mwkoh/twit88.com/home/includes/file.inc</em> on line <em>647</em>.', 2, '', 'https://twit88.com/home/node/26', 'https://twit88.com/home/popular/alltime', '207.241.237.225', 1461299876) in /home/mwkoh/twit88.com/home/includes/database.mysql.inc on line 172

Documentation about reading QR codes

I'm making an open source barcode reader in java mobile I want to ask the developpers how complicated it is and if they have documentation on how to decode a QR ! Thank you !