使用PHP读取资料
使用PHP读取文件
PHP的IO操作比起java来说简单的不是一点点,同样的读取文件java的处理比较繁琐,php基本上就是几句代码就出来了。从这些地方来说php真的是比较方便,这次分享的是php文件操作的读取几种文件的方法
1.读取普通文件主要就是文本文件的读取方法
读取txt文本文件php给我们提供了比较常用的两种方法,还是先从简单的说起代码如下
<?php $path="usephp.txt"; //判断文件是否存在 if(file_exists($path)){ $str=file_get_contents($path); echo $str; }else{ die("文件不存在"); } ?>
这种方法用于读取比较小的文件效果最好,如果读取大文件可能对apache造成很大的冲击,因为文件是一整个直接被读取出来。所以使用下面这种可能比较好
<?php $path="usephp.txt"; /*判断文件是否存在*/ if(file_exists($path)){ $fp=fopen($path,"r"); $str=""; //设置缓冲区的大小为1024个字节 $buf=1024; //用于验证读取文件的安全性(可选) $tem=0; while(!feof($fp)&&$buf-$tem>0){ $str.=fread($fp,$buf); $tem+=$buf; } echo $str; }else{ die("文件不存在"); } fclose($fp); ?>
2.读取资源文件或者配置文件
对于资源文件或者配置文件,php也为我们提供了对于的方法,个人觉得php读这种文件的方法很好使,来简单看下我的资源文件
下面把读取资源文件的代码贴出来
<?php $path="pool.properties"; //判断文件是否存在 if(file_exists($path)){ $str=parse_ini_file($path); foreach ($str as $key => $value ) { echo "$key : $value".""; } }else{ die("文件不存在"); } ?>
下面是程序运行效果图
是不是比java操作文件要简单呢?

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