how to write/read objects in file.

[Anon]

hi ,
i need the way , how to write/read objects in file-system.

i tried one code but that went into vein..

my code is:

<?

$file_name = "/home1/home5/ns-home/docs/jhtml/php/deepak/files/temp.dat";

class fileoper{
var $dept_name;
var $dept_id;
var $handler_name;
var $group_name;
var $group_id;
}//class ends

function op_file_read($file_name){
$fp = fopen($file_name, "r");
if(!$fp){
return("Error in file opening:".$file_name);
}

 $abc1 =  fread($fp,sizeof(new fileoper())); 
 echo sizeof($abc1);
 echo "<br>here:".$abc1;
 echo "deepak<br>".$abc1->dept_name;     	  
 echo "<br>".$abc1->dept_id;       
 echo "<br>".$abc1->handler_name;  
 echo "<br>".$abc1->group_name;    
 echo "<br>".$abc1->group_id;

 fclose($fp);

}//read ends

function op_file_print($abc1){

echo "deepak<br>".$abc1->dept_name;     	  
echo "<br>".$abc1->dept_id;       
echo "<br>".$abc1->handler_name;  
echo "<br>".$abc1->group_name;    
echo "<br>".$abc1->group_id;

}//modify ends

function op_file_append($file_name, $abc){
$fp = fopen($file_name,"w");
if(!$fp){
return("Error in file opening:".$file_name);
}
$fwr_error = fwrite($fp, $abc, sizeof($abc));
if(!$fwr_error){
return("file writing error");
}
fclose($fp);
return "no problem";
}//write ends

$abc = new fileoper(); 
$abc->dept_name = "e-content";     	  
$abc->dept_id = "01:01";       
$abc->handler_name ="mr moon";  
$abc->group_name = "design dept";    
$abc->group_id = "01";

$error_code1 = op_file_append($file_name, $abc); 
echo $error_code1;

$error_code2 = op_file_read($file_name);
echo $error_code2; 

?>

my output is:
no problem1
here:deepak

ends here

but i want to retrive my data
and i temp.dat file this is written:
"Object"

sincearly
deepak

[Anon]

http://www.php.net/manual/en/function.serialize.php

[Anon]

hi hayley,

this is next code i tried, it writes object in file but it is not able to read that file.
i understand this is because of not object of class, then how it will return the same class object.

<?
class A
{
var $name = "deepak";
var $age = 24;
var $empid = "137565";

  function show_fun(){
    echo $this->name;
    echo $this->age;
    echo $this->empid;
  }//fun ends

}//class ends

$file_name = "/home1/home5/ns-home/docs/jhtml/php/deepak/files/temp.dat";

$a = new A();
$a = addslashes($a);
$s = serialize($a);

$fp = fopen("$file_name", "w");
fputs($fp, $s);
fclose($fp);

$fp = fopen($file_name,"r");
$s = fgets($fp, filesize($file_name));
fclose($fp);

$s = stripslashes($s);
$a = unserialize($s);

$a->show_fun();

?>
this is file write operation in temp.dat:
O:1:"a":3:{s:4:"name";s:6:"deepak";s:3:"age";i:24;s:5:"empid";s:6:"137565";}

this is error occured:
Fatal error: Call to a member function on a non-object in /home5/ns-home/docs/jhtml/php/deepak/files/testfile3.php
on line 36
line no 36: $a->show_fun();

note: i understand this is because of not object of class, then how it will return the same class object.