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PHP3 (.php3)

.php3 file signature | text/x-php

Safe

Magic Bytes

Offset 0
3C 3F 70 68 70

Sources: Apache Tika

Extension

.php3

MIME Type

text/x-php

Byte Offset

0

Risk Level

Safe

Validation Code

How to validate .php3 files in Python

Python 
def is_php3(file_path: str) -> bool:
    """Check if file is a valid PHP3 by magic bytes."""
    signature = bytes([0x3C, 0x3F, 0x70, 0x68, 0x70])
    with open(file_path, "rb") as f:
        return f.read(5) == signature

How to validate .php3 files in Node.js

Node.js 
function isPHP3(buffer: Buffer): boolean {
  const signature = Buffer.from([0x3C, 0x3F, 0x70, 0x68, 0x70]);
  return buffer.subarray(0, 5).equals(signature);
}

How to validate .php3 files in Go

Go 
func IsPHP3(data []byte) bool {
    signature := []byte{0x3C, 0x3F, 0x70, 0x68, 0x70}
    if len(data) < 5 {
        return false
    }
    return bytes.Equal(data[:5], signature)
}

API Endpoint

GET /api/v1/php3
curl https://filesignature.org/api/v1/php3

See the full API documentation for all endpoints and parameters.

Frequently Asked Questions

What is a .php3 file?

A .php3 file is a PHP3 file.

What are the magic bytes for .php3 files?

The magic bytes for PHP3 files are 3C 3F 70 68 70 at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.

How do I validate a .php3 file?

To validate a .php3 file, read the first bytes of the file and compare them against the known magic bytes (3C 3F 70 68 70) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.

What is the MIME type for .php3 files?

The primary MIME type for .php3 files is text/x-php.

Is it safe to open .php3 files?

PHP3 (.php3) files are generally safe to open. They are classified as low risk because they primarily contain data rather than executable code. However, always ensure files come from a trusted source.