php读取文件内容的五种方式
分享下php读取文件内容的五种方法:好吧,写完后发现文件全部没有关闭。实际应用当中,请注意关闭 fclose($fp);
--
php读取文件内容:
-----第一种方法-----fread()--------
<?php $file_path = "test.txt"; if(file_exists($file_path)){ $fp = fopen($file_path,"r"); $str = fread($fp,filesize($file_path));//指定读取大小,这里把整个文件内容读取出来 echo $str = str_replace("\r\n","<br />",$str); } ?>
--------第二种方法------------
<?php $file_path = "test.txt"; if(file_exists($file_path)){ $str = file_get_contents($file_path);//将整个文件内容读入到一个字符串中 $str = str_replace("\r\n","<br />",$str); echo $str; } ?>
-----第三种方法------------
<?php $file_path = "test.txt"; if(file_exists($file_path)){ $fp = fopen($file_path,"r"); $str = ""; $buffer = 1024;//每次读取 1024 字节 while(!feof($fp)){//循环读取,直至读取完整个文件 $str .= fread($fp,$buffer); } $str = str_replace("\r\n","<br />",$str); echo $str; } ?>
-------第四种方法--------------
<?php $file_path = "test.txt"; if(file_exists($file_path)){ $file_arr = file($file_path); for($i=0;$i<count($file_arr);$i++){//逐行读取文件内容 echo $file_arr[$i]."<br />"; } /* foreach($file_arr as $value){ echo $value."<br />"; }*/ } ?>
----第五种方法--------------------
<?php $file_path = "test.txt"; if(file_exists($file_path)){ $fp = fopen($file_path,"r"); $str =""; while(!feof($fp)){ $str .= fgets($fp);//逐行读取。如果fgets不写length参数,默认是读取1k。 } $str = str_replace("\r\n","<br />",$str); echo $str; } ?>
以上内容给大家分享了PHP读取文件内容的五种方式,希望大家喜欢。

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