PHP 7.4

Removed Extensions

These extensions have been moved to PECL and are no longer part of the PHP distribution. The PECL package versions of these extensions will be created according to user demand.

Firebird/Interbase - access to an InterBase and/or Firebird based database is still available with the PDO Firebird driver.
Recode
WDDX

PHP 5.4

Removed Extensions

These extensions have been moved to PECL and are no longer part of the PHP distribution. The PECL package versions of these extensions will be created according to user demand.

sqlite - Note that ext/sqlite3 and ext/pdo_sqlite are not affected

PHP 5.3

Removed Extensions

These extensions have been moved to PECL and are no longer part of the PHP distribution. The PECL package versions of these extensions will be created according to user demand.

dbase - No longer maintained
fbsql - No longer maintained
fdf - Maintained
ming - Maintained
msql - No longer maintained
ncurses - Maintained
sybase - Discontinued; use the sybase_ct extension instead
mhash - Discontinued; use the hash extension instead. hash has full mhash compatibility; all existing applications using the old functions will continue to work.

PHP 5.2

Removed Extensions

These extensions have been moved to PECL and are no longer part of the PHP distribution. The PECL package version of these extensions will be created according to user demand.