<?php
//write data
$f = fopen ('data.txt','w');
if($f){
fwrite($f,'Hello PHP');
fclose($f);
echo "ok";
}else{
echo '文件创建失败';
}
?><?php
//read data
$f = fopen ('data.txt','r');
$content = fgets($f);//fgets一次读取一行数据
echo $content;//第一行
echo fgets($f);//第二行
echo fgets($f);//第三行
fclose($f);
?><?php
//read循环处理，读取所有数据
$f = fopen ('data.txt','r');
while (!feof($f)){
$content = fgets($f);
echo $content;
}
fclose($f);
?><?php
//read data 最简单方式
echo file_get_contents('data.txt');
?>