... 108-109indices for databases, 147to sockets, 169XOR operator (logical), 18 Zend Performance Suite, 197 Zend PHP Certification, exams,registering, 201How can we make this index more useful? ... AM Page 238Please purchase PDF Split-Merge on www.verypdf.com to remove this watermark.239 Zend PHP Certification dollar sign ($) syntax, 13function of, 12scope, 30-31script advantages, 13strings, ... 9-10referential integrity, 148register_globals directive, enabled dangers, 178-179registering for Zend PHP Certification exam, 201-202regular expressions (regexps), 98data extraction, 100-101pattern...