此段代码可以打印文本中的随机行数,例如,一个文本中有1W行,我需要随机取出500行。
1. $file="txt";
2. $data=file_get_contents($file);
3. $arr=explode("\n",$data);
4. $count=count($arr)-1;
5. $num=500;
6. for($i=1;$i
7. $n=rand(0,$count);
8. echo $arr[$n]."\n";
9. }
本文出自 “mcshell学习博客” 博客

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