Task 544: .PHP4 File Format
Task 544: .PHP4 File Format
1. Properties of the .PHP4 File Format Intrinsic to Its File System
The .PHP4 file format refers to text-based PHP scripts specifically associated with PHP version 4. It does not possess a binary structure or magic numbers, as it is essentially a plain text file containing PHP code, which may be intermixed with HTML. The specifications are derived from PHP documentation and file extension registries, indicating that .PHP4 files are parsed by a PHP engine on a web server. The properties intrinsic to its file system representation (i.e., metadata stored by the operating system's file system for any regular file, including .PHP4) are as follows:
- Inode number: A unique identifier for the file within the file system.
- Permissions (mode): The access rights, typically represented in octal notation (e.g., 0644 for read/write by owner, read by others).
- Number of hard links: The count of directory entries pointing to the same inode.
- Owner user ID (UID): The numeric identifier of the file's owner.
- Owner group ID (GID): The numeric identifier of the file's group.
- Device ID: The identifier of the device containing the file system.
- File size: The size of the file in bytes.
- Access time (atime): The timestamp of the last file access.
- Modification time (mtime): The timestamp of the last content modification.
- Change time (ctime): The timestamp of the last metadata change (or creation time on some systems).
These properties are standard for files in Unix-like file systems (e.g., ext4, NTFS) and are not unique to .PHP4 but intrinsic to how the file is managed by the file system.
2. Direct Download Links for .PHP4 Files
Two direct download links for files with the .PHP4 extension are provided below:
- https://racunovodski-servis.com/upload/footresf(1).php4
- http://www.unimarbles.com/jm3eetak_editor/File/footerz(2).php4
3. HTML/JavaScript for Drag-and-Drop .PHP4 File Property Dump
The following is an embedded HTML and JavaScript snippet suitable for inclusion in a blog post. It enables a user to drag and drop a .PHP4 file, whereupon it displays the available file system properties accessible via the browser's File API (note: browser security limits access to metadata such as inode, UID, or permissions; only basic properties are retrievable).
4. Python Class for Handling .PHP4 Files
The following Python class opens a .PHP4 file, reads its content (with no decoding required beyond text handling), allows writing new content, and prints the file system properties using os.stat.
import os
import stat
import time
class PHP4FileHandler:
def __init__(self, filepath):
self.filepath = filepath
if not self.filepath.endswith('.php4'):
raise ValueError("File must have .php4 extension")
def read_content(self):
with open(self.filepath, 'r', encoding='utf-8') as f:
return f.read()
def write_content(self, content):
with open(self.filepath, 'w', encoding='utf-8') as f:
f.write(content)
def print_properties(self):
st = os.stat(self.filepath)
print(f"Inode number: {st.st_ino}")
print(f"Permissions: {oct(st.st_mode)} ({stat.filemode(st.st_mode)})")
print(f"Number of hard links: {st.st_nlink}")
print(f"Owner UID: {st.st_uid}")
print(f"Owner GID: {st.st_gid}")
print(f"Device ID: {st.st_dev}")
print(f"File size: {st.st_size} bytes")
print(f"Access time: {time.ctime(st.st_atime)}")
print(f"Modification time: {time.ctime(st.st_mtime)}")
print(f"Change time: {time.ctime(st.st_ctime)}")
# Example usage:
# handler = PHP4FileHandler('example.php4')
# print(handler.read_content())
# handler.write_content('<?php echo "Hello"; ?>')
# handler.print_properties()
5. Java Class for Handling .PHP4 Files
The following Java class opens a .PHP4 file, reads its content, allows writing new content, and prints the file system properties using java.nio.file.
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.file.attribute.BasicFileAttributes;
import java.nio.file.attribute.PosixFileAttributes;
import java.nio.file.attribute.PosixFilePermissions;
public class PHP4FileHandler {
private final Path path;
public PHP4FileHandler(String filepath) {
this.path = Paths.get(filepath);
if (!filepath.endsWith(".php4")) {
throw new IllegalArgumentException("File must have .php4 extension");
}
}
public String readContent() throws IOException {
return Files.readString(path, StandardCharsets.UTF_8);
}
public void writeContent(String content) throws IOException {
try (BufferedWriter writer = Files.newBufferedWriter(path, StandardCharsets.UTF_8)) {
writer.write(content);
}
}
public void printProperties() throws IOException {
BasicFileAttributes attrs = Files.readAttributes(path, BasicFileAttributes.class);
System.out.println("Inode number: Not directly accessible in Java (use platform-specific if needed)");
System.out.println("Permissions: " + PosixFilePermissions.toString(Files.readAttributes(path, PosixFileAttributes.class).permissions()));
System.out.println("Number of hard links: Not directly supported");
System.out.println("Owner: " + Files.getOwner(path));
System.out.println("Group: " + Files.readAttributes(path, PosixFileAttributes.class).group());
System.out.println("Device ID: Not directly supported");
System.out.println("File size: " + attrs.size() + " bytes");
System.out.println("Access time: " + attrs.lastAccessTime());
System.out.println("Modification time: " + attrs.lastModifiedTime());
System.out.println("Change time: " + attrs.creationTime());
}
// Example usage:
// public static void main(String[] args) throws IOException {
// PHP4FileHandler handler = new PHP4FileHandler("example.php4");
// System.out.println(handler.readContent());
// handler.writeContent("<?php echo \"Hello\"; ?>");
// handler.printProperties();
// }
}
6. JavaScript Class for Handling .PHP4 Files (Node.js)
The following JavaScript class (for Node.js environment) opens a .PHP4 file, reads its content, allows writing new content, and prints the file system properties using fs.stat.
const fs = require('fs');
const path = require('path');
class PHP4FileHandler {
constructor(filepath) {
if (!filepath.endsWith('.php4')) {
throw new Error('File must have .php4 extension');
}
this.filepath = filepath;
}
readContent() {
return fs.readFileSync(this.filepath, 'utf8');
}
writeContent(content) {
fs.writeFileSync(this.filepath, content, 'utf8');
}
printProperties() {
const stats = fs.statSync(this.filepath);
console.log(`Inode number: ${stats.ino}`);
console.log(`Permissions: ${stats.mode.toString(8)} (0o${(stats.mode & 0o777).toString(8)})`);
console.log(`Number of hard links: ${stats.nlink}`);
console.log(`Owner UID: ${stats.uid}`);
console.log(`Owner GID: ${stats.gid}`);
console.log(`Device ID: ${stats.dev}`);
console.log(`File size: ${stats.size} bytes`);
console.log(`Access time: ${stats.atime}`);
console.log(`Modification time: ${stats.mtime}`);
console.log(`Change time: ${stats.ctime}`);
}
}
// Example usage:
// const handler = new PHP4FileHandler('example.php4');
// console.log(handler.readContent());
// handler.writeContent('<?php echo "Hello"; ?>');
// handler.printProperties();
7. C Code for Handling .PHP4 Files
The following C code defines a struct (equivalent to a class) and functions to open a .PHP4 file, read its content, write new content, and print the file system properties using stat.
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <time.h>
#include <unistd.h>
#include <fcntl.h>
typedef struct {
char *filepath;
} PHP4FileHandler;
PHP4FileHandler* create_handler(const char *filepath) {
if (strstr(filepath, ".php4") != filepath + strlen(filepath) - 5) {
fprintf(stderr, "File must have .php4 extension\n");
exit(1);
}
PHP4FileHandler *handler = malloc(sizeof(PHP4FileHandler));
handler->filepath = strdup(filepath);
return handler;
}
char* read_content(PHP4FileHandler *handler) {
FILE *f = fopen(handler->filepath, "r");
if (!f) {
perror("fopen");
return NULL;
}
fseek(f, 0, SEEK_END);
long size = ftell(f);
fseek(f, 0, SEEK_SET);
char *content = malloc(size + 1);
fread(content, 1, size, f);
content[size] = '\0';
fclose(f);
return content;
}
void write_content(PHP4FileHandler *handler, const char *content) {
FILE *f = fopen(handler->filepath, "w");
if (!f) {
perror("fopen");
return;
}
fprintf(f, "%s", content);
fclose(f);
}
void print_properties(PHP4FileHandler *handler) {
struct stat st;
if (stat(handler->filepath, &st) == -1) {
perror("stat");
return;
}
printf("Inode number: %ld\n", (long)st.st_ino);
printf("Permissions: %o (%s)\n", st.st_mode & 07777, (st.st_mode & S_IRUSR) ? "r" : "-");
printf("Number of hard links: %ld\n", (long)st.st_nlink);
printf("Owner UID: %d\n", st.st_uid);
printf("Owner GID: %d\n", st.st_gid);
printf("Device ID: %ld\n", (long)st.st_dev);
printf("File size: %ld bytes\n", (long)st.st_size);
printf("Access time: %s", ctime(&st.st_atime));
printf("Modification time: %s", ctime(&st.st_mtime));
printf("Change time: %s", ctime(&st.st_ctime));
}
void destroy_handler(PHP4FileHandler *handler) {
free(handler->filepath);
free(handler);
}
// Example usage:
// int main() {
// PHP4FileHandler *handler = create_handler("example.php4");
// char *content = read_content(handler);
// if (content) {
// printf("%s\n", content);
// free(content);
// }
// write_content(handler, "<?php echo \"Hello\"; ?>");
// print_properties(handler);
// destroy_handler(handler);
// return 0;
// }