Reading a File in Binary Mode in PHP

Q

How To Read a File in Binary Mode in PHP?

✍: FYIcenter.com

A

If you have a file that stores binary data, like an executable program or picture file, you need to read the file in binary mode to ensure that none of the data gets modified during the reading process. You need to:

Open the file with fopen($fileName, "rb").
Read data with fread($fileHandle,$length).

Here is a PHP script example on reading binary file:

<?php 
$in = fopen("/windows/system32/ping.exe", "rb");
$out = fopen("/temp/myPing.exe", "w");
$count = 0;
while (!feof($in)) {
  $count++;
  $buffer = fread($in,64);
  fwrite($out,$buffer);
}
fclose($out); 
fclose($in);
print("About ".($count*64)." bytes read.\n"); 
?>

This script will print:

About 16448 bytes read.

This script actually copied an executable program file ping.exe in binary mode to new file. The new file should still be executable. Try it: \temp\myping dev.fyicenter.com.

⇒ Writing a String to a File with a File Handle in PHP

⇐ Issue with "while ($c=fgetc($f))" Loop in PHP

⇑ Reading and Writing Files in PHP

⇑⇑ PHP Tutorials

2024-01-04, ≈14🔥, 1💬

Reading a File in Binary Mode in PHP
How To Read a File in Binary Mode in PHP? If you have a file that stores binary data, like an executable program or picture file, you need to read the file in binary mode to ensure that none of the data gets modified during the reading process. You need to: Open the file with fopen($fileName, "rb").... 2024-01-04, ≈14🔥, 1💬

Opening Standard Output as a File Handle in PHP
How To Open Standard Output as a File Handle in PHP? If you want to open the standard output as a file handle yourself, you can use the fopen("php://stdout") function. It creates a special file handle linking to the standard output, and returns the file handle. Once the standard output is opened to ... 2016-11-24, ∼7918🔥, 0💬

Issue with "while ($c=fgetc($f))" Loop in PHP
What's Wrong with "while ($c=fgetc($f)) {}" in PHP? If you are using "while ($c=fgetc($f)) {}" to loop through each character in a file, the loop may end in the middle of the file when there is a "0" character, because PHP treats "0" as Boolean false. To properly loop to the end of the file, you sho... 2016-11-27, ∼6069🔥, 0💬

Reading One Line of Text from a File in PHP
How To Read One Line of Text from a File in PHP? If you have a text file with multiple lines, and you want to read those lines one line at a time, you can use the fgets() function. It reads the current line up to the "\n" character, moves the file pointer to the next line, and returns the text line ... 2016-12-02, ∼4079🔥, 0💬

Writing a String to a File without a File Handle in PHP
How To Write a String to a File without a File Handle in PHP? If you have a string, want to write it to a file, and you don't want to open the file with a file handle, you can use the file_put_contents(). It opens the specified file, writes the specified string, closes the file, and returns the numb... 2016-11-27, ∼3532🔥, 0💬

Writing a String to a File with a File Handle in PHP
How To Write a String to a File with a File Handle in PHP? If you have a file handle linked to a file opened for writing, and you want to write a string to the file, you can use the fwrite() function. It will write the string to the file where the file pointer is located, and moves the file pointer ... 2016-11-27, ∼3220🔥, 0💬

Reading One Character from a File in PHP
How To Read One Character from a File in PHP? If you have a text file, and you want to read the file one character at a time, you can use the fgetc() function. It reads the current character, moves the file pointer to the next character, and returns the character as a string. If end of the file is r... 2016-12-02, ∼3080🔥, 0💬

Opening a File for Writing in PHP
How To Open a File for Writing in PHP? If you want to open a new file and write date to the file, you can use the fopen($fileName, "w") function. It creates the specified file, and returns a file handle. The second argument "w" tells PHP to open the file for writing. Once the file is open, you can u... 2016-12-02, ∼2970🔥, 0💬

Appending Data to the End of a File in PHP
How To Append New Data to the End of a File in PHP? If you have an existing file, and want to write more data to the end of the file, you can use the fopen($fileName, "a") function. It opens the specified file, moves the file pointer to the end of the file, and returns a file handle. The second argu... 2016-12-02, ∼2959🔥, 0💬

All rights in the contents of this web site are reserved by the individual author. fyicenter.com does not guarantee the truthfulness, accuracy, or reliability of any contents.