Modern PHP uses the generator to process CSV files Generator

* Using the generator to process CSV files

<?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);} Memory is allocated only for one row in the CSV file//No need to read the entire CSV file to memory $generator = GetRows ('. /data/t_video.csv ');//foreach ($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", "Other", "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 "," other "," 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 "," Other "," 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] =    [1] = Dragon Education    [2] = Dragon Education _ 3rd Issue    [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] =-long education 3rd 20171103 Puyang First experimental primary school students Fan Ziheng) Array (    [0] =    [1 ]    [2] = Youth Mood-Puyang Fan County-Wang    [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] = youth mood. Make a game: grab your finger)

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 $v alue) Public    mixed throw (Throwable $exception) publicly    bool valid (void) public    void __wakeup (void) 
   }}

　　

　　

　　

Modern PHP uses the generator to process CSV files Generator