PHP CodeSniffer Tags
The PHP CodeSniffer Tags are the annotations PHP_CodeSniffer recognizes to turn its own rules on and off inside a file. Unlike every other group in this section, these tags have nothing to do with types or documentation at all — they are coding-standard directives, telling the sniffer to skip a line, a block, or a whole file when checking style.
They come in two spellings: the modern @phpcs: form and the older @codingStandardsIgnore* family kept for backward compatibility with rules written against earlier PHP_CodeSniffer releases.
What This Group Covers
Scoped suppression (modern) — @phpcs:suppress, disabling one or more named sniffs for the following statement.
Region suppression (legacy) — @codingStandardsIgnoreStart and @codingStandardsIgnoreEnd bracket a block the sniffer should skip, while @codingStandardsIgnoreLine skips a single line and @codingStandardsIgnoreFile exempts the entire file.
General marker — @codingStandards, the bare root of that legacy family.
For the authoritative behavior, see PHP_CodeSniffer's wiki on ignoring code.