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Ondřej Hošek RavuAlHemio

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RavuAlHemio / jpeg-markers.md
Last active May 4, 2025 22:02
descriptions of all JPEG marker types

JPEG marker types

Taken from ISO/IEC 10918-1:1994.

Most hexadecimal digits are written in uppercase; b is written in lowercase to reduce confusion of B with 8.

sequence length abbr description reference to standard
FF00 0 not a marker; actual 0xFF value in entropy-coded data segment §§ D.1.6, F.1.2.3
FF01 0 TEM temporary value used during arithmetic coding § D.1.6
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RavuAlHemio / passing-variables-to-php.md
Last active May 7, 2025 18:44

Passing variables to PHP

Sometimes, we wish to pass the values of specific variables to PHP, e.g. if we have multiple instances of the same application which should obtain its configuration from different files.

This is an attempt to find a method that is independent of web server and SAPI.

The PHP file in question is: