PHP Read File

In PHP, you can read the contents of a file using various file reading functions. Here are some commonly used methods to read a file:

1. file_get_contents():
   The file_get_contents() function reads the entire contents of a file into a string. It is a simple and convenient way to read small files.

Example:

$filename = "example.txt";
$file_contents = file_get_contents($filename);

// Output the file contents
echo $file_contents;

2. fopen() and fread():
   The fopen() function is used to open the file and establish a file handle, and fread() is used to read a specified number of bytes from the file.

Example:

$filename = "example.txt";
$file_handle = fopen($filename, "r");

// Read the first 100 bytes from the file
$file_contents = fread($file_handle, 100);

// Output the read contents
echo $file_contents;

// Close the file handle
fclose($file_handle);

3. fgets():
   The fgets() function reads a single line from the file.

Example:

$filename = "example.txt";
$file_handle = fopen($filename, "r");

// Read a line from the file
$line = fgets($file_handle);

// Output the line
echo $line;

// Close the file handle
fclose($file_handle);

4. Reading Line by Line with feof() and fgets():
   You can use a loop to read the file line by line until the end of the file is reached.

Example:

$filename = "example.txt";
$file_handle = fopen($filename, "r");

while (!feof($file_handle)) {
    $line = fgets($file_handle);
    echo $line;
}

// Close the file handle
fclose($file_handle);

These are basic examples for reading files in PHP. Remember to handle error cases, such as file not found or permission issues, by using appropriate error handling mechanisms like try-catch blocks or file_exists() checks before attempting to read the file. Also, always close the file handle after reading to free system resources.