Núcleo de PHP:
M_EULER
M_LNPI
M_SQRT3
M_SQRTPI
PATHINFO_FILENAME
PREG_BACKTRACK_LIMIT_ERROR
PREG_BAD_UTF8_ERROR
PREG_INTERNAL_ERROR
PREG_NO_ERROR
PREG_RECURSION_LIMIT_ERROR
UPLOAD_ERR_EXTENSION
STREAM_SHUT_RD
STREAM_SHUT_WR
STREAM_SHUT_RDWR
curl:
CURLE_FILESIZE_EXCEEDED
CURLE_FTP_SSL_FAILED
CURLE_LDAP_INVALID_URL
CURLFTPAUTH_DEFAULT
CURLFTPAUTH_SSL
CURLFTPAUTH_TLS
CURLFTPSSL_ALL
CURLFTPSSL_CONTROL
CURLFTPSSL_NONE
CURLFTPSSL_TRY
CURLOPT_FTP_SSL
CURLOPT_FTPSSLAUTH
CURLOPT_TCP_NODELAY
Añadido en PHP 5.2.1.
CURLOPT_TIMEOUT_MS
Añadido en PHP 5.2.3
CURLOPT_CONNECTTIMEOUT_MS
Añadido en PHP 5.2.3
GMP:
GMP_VERSION
Añadido en PHP 5.2.2.
ming:
SWFTEXTFIELD_USEFONT
SWFTEXTFIELD_AUTOSIZE
SWF_SOUND_NOT_COMPRESSED
SWF_SOUND_ADPCM_COMPRESSED
SWF_SOUND_MP3_COMPRESSED
SWF_SOUND_NOT_COMPRESSED_LE
SWF_SOUND_NELLY_COMPRESSED
SWF_SOUND_5KHZ
SWF_SOUND_11KHZ
SWF_SOUND_22KHZ
SWF_SOUND_44KHZ
SWF_SOUND_8BITS
SWF_SOUND_16BITS
SWF_SOUND_MONO
SWF_SOUND_STEREO
OPENSSL_VERSION_NUMBER
OPENSSL_VERSION_TEXT
snmp:
SNMP_OID_OUTPUT_FULL
SNMP_OID_OUTPUT_NUMERIC
MSG_EAGAIN
MSG_ENOMSG