PHP Open File – fopen():
A better method to open files is with the fopen() function.
PHP Read File – Fread():
The fread() function reads from an open file.
PHP Read Single Line – Fgets():
The fgets() function is used to read a single line from a file.
PHP Write To File – Fwrite():
The fwrite() function is used to write to a file.
r => Open a file for read only. File pointer starts at the beginning of the file
w=> Open a file for write only. Erases the contents of the file or creates a new file if it doesn’t exist. File pointer starts at the beginning of the file
a=> Open a file for write only. The existing data in file is preserved. File pointer starts at the end of the file. Creates a new file if the file doesn’t exist
(1)TO WRITE A TEXT “this is my file” INTO A FILE NAME IS “abc.txt” Code is use mode “w”:
<?php
$fhandle=fopen(“abc.txt”,”w”);
fwrite($fhandle,”this is my file”);
?>
(2) To read text form “abc.txt “ file using filesize() & fread() function use mode “r”:
<?php
$fhandle=fopen(“abc.txt”,”r”);
$line=fread($fhandle,filesize(“abc.txt”));
echo $line;
?>
(3) To read text form “abc.txt “ file using while loop use mode “r” :
<?php
$file = fopen(“abc.txt”, “r”);
//Output a line of the file until the end is reached
while(! feof($file))
{
echo fgets($file). “<br />”;
}
fclose($file);
?>
(3)how to append new line to file “abc.txt” just use mode “a” :
<?php
$fhandle=fopen(“ok.txt”,”a”);
fwrite($fhandle,”this is my file om maurya”);
?>
====
Simple PHP Application to save website content from a website to a file then make search to that file:
Step 1: store website content to a file code given below :
<?php
$curl_handle=curl_init();
curl_setopt($curl_handle,CURLOPT_URL,'http://www.vissicomp.com');
curl_setopt($curl_handle,CURLOPT_CONNECTTIMEOUT,2);
curl_setopt($curl_handle,CURLOPT_RETURNTRANSFER,1);
$buffer = curl_exec($curl_handle);
$fhandle=fopen(“example.txt”,”a”);
fwrite($fhandle,$buffer);
curl_close($curl_handle);
if (empty($buffer))
{
print “Nothing returned from url.<p>”;
}
else
{
print $buffer;
}
?>
Step 2 make Search in that file for particular word:
(a)write code for search.html:
<form action=searchst.php method=post>
<input type=text name=search>
<input type=submit name=submit value=submit>
</form>
(b)write code for searchst.php file:
<?php
$search = $_POST[‘search’];
// Read from file
$lines = file(‘example.txt’);
foreach($lines as $line)
{
// Check if the line contains the string we’re looking for, and print if it does
if(strpos($line, $search) !== false)
echo”<html><title>SEARCH RESULTS FOR: $search</title><font face=’Arial’> $line <hr>”;
}
?>