PHP Version 5.3 Formula was removed
Last versions were

Revision: 8

php53 requires the following formulae to be installed:
enchant 2.2.3 Spellchecker wrapping library
freetype 2.9 Software library to render fonts
gettext GNU internationalization (i18n) and localization (l10n) library
gmp 6.1.2_2 GNU multiple precision arithmetic library
icu4c 61.1 C/C++ and Java libraries for Unicode and globalization
jpeg 9c Image manipulation library
libpng 1.6.34 Library for manipulating PNG images
libxml2 2.9.7 GNOME XML library
unixodbc 2.3.6 ODBC 3 connectivity for UNIX
readline 7.0.3_1 Library for command-line editing
openssl 1.0.2o_1 SSL/TLS cryptography library
autoconf 2.69 Automatic configure script builder
re2c 1.0.3 Generate C-based recognizers from regular expressions
flex 2.6.4 Fast Lexical Analyzer, generates Scanners (tokenizers)
bison@2.7 2.7.1_1 Parser generator
libevent 2.1.8 Asynchronous event library

Recent formula history

Mike McQuaid Deprecate tap.
Jan Viljanen php53: C++11 compatibility requred for intl extension
Jan Viljanen php53: revision bump
Tom Sullivan Update bison and zlib dependencies
Jan Viljanen php53: readline rev bottle update

Formula code at GitHub