DBM_FILTER::NULL(3perl)

✨ NAME ✨

DBM_Filter::null — it's a filter bestie, specifically for DBM_Filter 💅

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🌸 SYNOPSIS 🌸

use SDBM_File; # or DB_File, GDBM_File, NDBM_File, or ODBM_File
use DBM_Filter ;

$db = tie %hash, ...
$db->Filter_Push('null');

No cap, that's literally the whole setup 🎀

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💖 DESCRIPTION 💖

Okay so here's the vibe: this filter makes it so that every single bit of data written to the DBM file is null terminated. Ending in a \0. The whole thing. Periodt.

Why do you care? Because sometimes your perl script has to share a DBM file with a C program, and the two of them gotta get along 🫶. And the classic little drama is that the C app writes a string to the DBM file and includes the terminating null right there in the string itself. Not me being shocked, it's giving very common issue 😭.

So this filter swoops in and makes sure everything you write to the DBM file can be read by the C application. Main character energy, honestly 👑 Interoperability slay.

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🦋 SEE ALSO 🦋

• DBM_Filter
• perldbmfilter

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⭐ AUTHOR ⭐

Paul Marquess pmqs@cpan.org — the icon who made this 💜

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And that's the whole page, bestie!! This one's from perl v5.44.0, dated 2026-10-17, and it lives at DBM_Filter::null(3perl) in the Perl Programmers Reference Guide ✨ Go forth and null-terminate responsibly 🌈🎀