Three ways to read file content in php_PHP tutorial

This article mainly introduces three methods of reading file content in PHP. Friends in need can refer to it

Three ways to read file content in php: ​ //**************The first reading method****************************** * The code is as follows: header("content-type:text/html;charset=utf-8"); //File path $file_path="text.txt"; //Determine whether this file exists if(file_exists($file_path)){ if($fp=fopen($file_path,"a+")){ //Read file $conn=fread($fp,filesize($file_path)); //replace string $conn=str_replace("rn","
",$conn); echo $conn."
"; }else{ echo "File cannot be opened"; } }else{ echo "There is no such file"; } fclose($fp); ​ //************************Second reading method************************ **** The code is as follows: header("content-type:text/html;charset=utf-8"); //File path $file_path="text.txt"; $conn=file_get_contents($file_path); $conn=str_replace("rn","
",file_get_contents($file_path)); echo $conn; fclose($fp); ​ //******************The third reading method, loop reading**************** The code is as follows: header("content-type:text/html;charset=utf-8"); //File path $file_path="text.txt"; //Determine whether the file exists if(file_exists($file_path)){ //Determine whether the file can be opened if($fp=fopen($file_path,"a+")){ $buffer=1024; //Determine whether the end of the file is reached while reading $str=""; while(!feof($fp)){ $str.=fread($fp,$buffer); } }else{ echo "File cannot be opened"; } }else{ echo "There is no such file"; } //Replace characters $str=str_replace("rn","
",$str); echo $str; fclose($fp); Function to read INI configuration file: $arr=parse_ini_file("config.ini"); //returns an array echo $arr['host']."
"; echo $arr['username']."
"; echo $arr['password']."
";