* 使用生成器处理csv文件
<?phpfunction getRows($file) { ???$handle = fopen($file, ‘rb‘); ???if ($handle === false) { ???????throw new Exception(‘open file ‘.$file.‘ error‘); ???} ???while (feof($handle) === false) { ???????yield fgetcsv($handle); ???} ???fclose($handle);}// 只会为csv文件中的一行分配内存// 不需要把整个csv文件都读取到内存$generator = getRows(‘../data/t_video.csv‘);// foreach ($it as $row) {print_r($row);}while ($generator->valid()) { ???print_r($generator->current()); ???$generator->next();}$generator->rewind();// http://php.net/manual/en/class.generator.php
input: ../data/t_video.csv
"9","其他","ULTIMATE PHOTO GUIDE",NULL,"http://118.190.209.209/media/mp4/1.mp4","http://118.190.209.209/media/png/1.png","ULTIMATE PHOTO GUIDE""10","其他","THE VERGE",NULL,"http://118.190.209.209/media/mp4/2.mp4","http://118.190.209.209/media/png/2.the_verge.png","THE VERGE""11","其他","Microsoft Power BI",NULL,"http://118.190.209.209/media/mp4/3.mp4","http://118.190.209.209/media/png/3.png","Microsoft Power BI"
output:
Array( ???[0] => 29 ???[1] => 龙都教育 ???[2] => 龙都教育_第3期 ???[3] => NULL ???[4] => http://118.190.209.209/media/mp4/%E9%BE%99%E9%83%BD%E6%95%99%E8%82%B21103VA0.mp4 ???[5] => http://118.190.209.209/media/poster/puyang_longdu_edu_1103.jpg ???[6] => 龙都教育第3期20171103 濮阳市第一实验小学学生 范子恒)Array( ???[0] => 30 ???[1] => 课程 ???[2] => 青春的情绪-濮阳范县-刘艳艳 ???[3] => NULL ???[4] => http://118.190.209.209/media/mp4/puyang/%E5%88%98%E8%89%B3%E8%89%B31_2017_6_12_17_6_32_2f45_0.mp4 ???[5] => http://118.190.209.209/media/poster/puyang/puyang01_liuyanyan_youth_emotion.jpg ???[6] => 青春的情绪. 做游戏:抓手指)
Generator:
Generator implements Iterator { ?/* Methods */ ?public mixed current ( void ) ???public mixed getReturn ( void ) ???public mixed key ( void ) ???public void next ( void ) ???public void rewind ( void ) ???public mixed send ( mixed $value ) ???public mixed throw ( Throwable $exception ) ???public bool valid ( void ) ???public void __wakeup ( void ) ?}}
Modern PHP 使用生成器处理csv文件 Generator
原文地址：https://www.cnblogs.com/mingzhanghui/p/9313389.html