PHP文件讀寫

    <?php

    $handle  = @ fopen ( "demo.txt" ,  "r" );

    if ( $handle ) {

        while (( $buffer  =  fgets ( $handle ,  4096 )) !==  false ) {

            echo  $buffer ;

        }

        if (! feof ( $handle )) {

            echo  "Error: unexpected fgets() fail\n" ;

        }

        fclose ( $handle );

    }


echo '<hr/>';  

$length= readfile("demo.txt");  

echo '<hr/>';  

$file_str = 'demo.txt';  

if(file_exists($file_str))  
{  
    echo file_get_contents($file_str);  

}  

?>  </pre>