In this PHP video tutorial I’ll cover how to manipulate files with PHP. Specifically I cover the following:
- Read file into an array
- Read file into a string
- Grab text off of web pages
- Strip HTML tags
- Write to files
Here is a link to the first article and video for this series, if you haven’t seen it Web Design and Programming.
All of the code follows the video. Use it in anyway. Leave any questions or comments below.
Code from the Video
<html>
<head>
<title><?php echo “Object Oriented Programming”;?></title>
</head>
<body>
<?php
# Creates a file descriptor and assigns it to $file
# The second attribute opens the file for read only purposes
# You can access any file online with this same function
# r+ – Read and Write from beginning of file
# w – Write only to beginning of file
# w+ – Delete contents and read and write to file
# a – Write only to the end of the file
# a+ – Read and Write to the end of the file
$file = fopen(“customers.txt”, “r”);
# While the end of file hasn’t been met print lines to screen
while (!feof($file))
{
# fgets() returns all the characters up to a newline or EOF
# You can also specify the number of characters to return in the 2nd attribute
echo fgets($file). “<br />”;
}
echo “<br />”;
# You can also read a file into an array
$customers = file(“customers.txt”);
foreach ($customers as $customer)
{
list($name,$street,$city,$state) = explode(“,”, $customer);
$state = trim($state);
echo “Name: ” . “$name <br />”;
echo “Street: ” . “$street <br />”;
echo “City: ” . “$city <br />”;
echo “State: ” . “$state <br /><br />”;
}
# Close the file
fclose($file);
$file4 = fopen(“customers.txt”, “a”);
$newCustomer = “\nRick,219 Almond St,Pittsburgh,PA”;
fwrite($file4, $newCustomer);
fclose($file4);
# You can also read a file into a string
$customers = file_get_contents(“customers.txt”);
$customers = explode(“\n”,$customers);
foreach ($customers as $customer)
{
list($name,$street,$city,$state) = explode(“,”, $customer);
$state = trim($state);
echo “Name: ” . “$name <br />”;
echo “Street: ” . “$street <br />”;
echo “City: ” . “$city <br />”;
echo “State: ” . “$state <br /><br />”;
}
$file2 = fopen(“http://www.wikileaks.ch/static/html/faq.html”, “rt”);
while (!feof($file2))
{
$faqs .= fgetss($file2, 1024);
}
fclose($file2);
$file3 = fopen(“justthefaqs.txt”, “wt”);
fwrite($file3, $faqs);
fclose($file3);
?>
</body>
</html>
