本文实例讲述了PHP获取文件行数的方法。分享给大家供大家参考。具体分析如下:
提供两种实现方法,虽然第二种简单易懂,但是第一种效率最好
第一种:
<span style="color: #000000">php </span><span style="color: #800080">$file_path</span> = 'xxx.txt'; <span style="color: #008000">//</span><span style="color: #008000">文件路径 </span> <span style="color: #800080">$line</span> = 0 ; <span style="color: #008000">//</span><span style="color: #008000">初始化行数 //打开文件 http://www.manongjc.com/article/1330.html</span> <span style="color: #800080">$fp</span> = <span style="color: #008080">fopen</span>(<span style="color: #800080">$file_path</span> , 'r') or <span style="color: #0000ff">die</span>("open file failure!"<span style="color: #000000">); </span><span style="color: #0000ff">if</span>(<span style="color: #800080">$fp</span><span style="color: #000000">){ </span><span style="color: #008000">//</span><span style="color: #008000">获取文件的一行内容,注意:需要php5才支持该函数; </span> <span style="color: #0000ff">while</span>(<span style="color: #008080">stream_get_line</span>(<span style="color: #800080">$fp</span>,8192,"\n"<span style="color: #000000">)){ </span><span style="color: #800080">$line</span>++<span style="color: #000000">; } </span><span style="color: #008080">fclose</span>(<span style="color: #800080">$fp</span>);<span style="color: #008000">//</span><span style="color: #008000">关闭文件 </span> <span style="color: #000000">} </span><span style="color: #008000">//</span><span style="color: #008000">输出行数; </span> <span style="color: #0000ff">echo</span> <span style="color: #800080">$line</span><span style="color: #000000">; </span>?>
第二种:
<span style="color: #000000">php </span><span style="color: #008000">//</span><span style="color: #008000">http://www.manongjc.com/article/1330.html</span> <span style="color: #800080">$line</span> = <span style="color: #008080">count</span>(<span style="color: #008080">file</span>('filename'<span style="color: #000000">)); </span><span style="color: #0000ff">echo</span> <span style="color: #800080">$line</span><span style="color: #000000">; </span>?>
第二种方式因为要保存文件的内容,效率上会很差