PHP finfo_set_flags() Function: Usage and Examples

Changes the options used by an existing fileinfo detector.

What Is finfo_set_flags() in PHP?

Changes the options used by an existing fileinfo detector.

Its syntax is:

finfo_set_flags(finfo $finfo, int $flags): bool

Parameters:

• $finfo — Accepted as finfo; required argument.
• $flags — Accepted as int; required argument.

Return type: bool. Changing flags affects later detector calls; FILEINFO_MIME differs from FILEINFO_MIME_TYPE because it can include a charset.

Availability: Requires fileinfo extension.

Example 1: Basic Usage

<?php

$detector = finfo_open(FILEINFO_MIME_TYPE); var_dump(finfo_set_flags($detector, FILEINFO_MIME));

Output:

bool(true)

Changing flags affects later detector calls; FILEINFO_MIME differs from FILEINFO_MIME_TYPE because it can include a charset.

Example 2: A Different Input

<?php

$detector = finfo_open(FILEINFO_MIME_TYPE); finfo_set_flags($detector, FILEINFO_MIME_TYPE); echo finfo_buffer($detector, "Hello");

Output:

text/plain

Changing flags affects later detector calls; FILEINFO_MIME differs from FILEINFO_MIME_TYPE because it can include a charset.

Practical Example: Applying It in a Program

<?php

$detector = finfo_open(); finfo_set_flags($detector, FILEINFO_MIME_TYPE); echo finfo_buffer($detector, "report text");

Output:

text/plain

Changing flags affects later detector calls; FILEINFO_MIME differs from FILEINFO_MIME_TYPE because it can include a charset.

Important Behavior and Edge Cases

• Key behavior: Changing flags affects later detector calls; FILEINFO_MIME differs from FILEINFO_MIME_TYPE because it can include a charset.
• Environment: Requires fileinfo extension.

Comparison With Related Functions

Common Beginner Mistakes

Key Takeaways

• Changes the options used by an existing fileinfo detector.
• Changing flags affects later detector calls; FILEINFO_MIME differs from FILEINFO_MIME_TYPE because it can include a charset.
• Requires fileinfo extension.

Summary: Changing flags affects later detector calls; FILEINFO_MIME differs from FILEINFO_MIME_TYPE because it can include a charset.