Detailed explanation of three methods of reading files in PHP

header("content-type:text/html;charset=utf-8"); //文件路径 $file_path="text.txt"; //判断是否有这个文件 if(file_exists($file_path)){ if($fp=fopen($file_path,"a+")){ //读取文件 $conn=fread($fp,filesize($file_path)); //替换字符串 $conn=str_replace("\r\n","
",$conn); echo $conn."
"; }else{ echo "文件打不开"; } }else{ echo "没有这个文件"; } fclose($fp);

header("content-type:text/html;charset=utf-8"); //文件路径 $file_path="text.txt"; $conn=file_get_contents($file_path); $conn=str_replace("\r\n","
",file_get_contents($file_path)); echo $conn; fclose($fp);

header("content-type:text/html;charset=utf-8"); //文件路径 $file_path="text.txt"; //判断文件是否存在 if(file_exists($file_path)){ //判断文件是否能打开 if($fp=fopen($file_path,"a+")){ $buffer=1024; //边读边判断是否到了文件末尾 $str=""; while(!feof($fp)){ $str.=fread($fp,$buffer); } }else{ echo "文件不能打开"; } }else{ echo "没有这个文件"; } //替换字符 $str=str_replace("\r\n","
",$str); echo $str; fclose($fp); 读取INI配置文件的函数: $arr=parse_ini_file("config.ini"); //返回的是数组 echo $arr['host']."
"; echo $arr['username']."
"; echo $arr['password']."
";