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Getting Started: Introduction; A simple tutorial
Language Reference: Basic syntax; Types; Variables; Constants; Expressions; Operators; Control Structures; Functions; Classes and Objects; Namespaces; Enumerations; Errors; Exceptions; Fibers; Generators; Attributes; References Explained; Predefined Variables; Predefined Exceptions; Predefined Interfaces and Classes; Predefined Attributes; Context options and parameters; Supported Protocols and Wrappers

Security: Introduction; General considerations; Installed as CGI binary; Installed as an Apache module; Session Security; Filesystem Security; Database Security; Error Reporting; User Submitted Data; Hiding PHP; Keeping Current
Features: HTTP authentication with PHP; Cookies; Sessions; Handling file uploads; Using remote files; Connection handling; Persistent Database Connections; Command line usage; Garbage Collection; DTrace Dynamic Tracing

Function Reference: Affecting PHP's Behaviour; Audio Formats Manipulation; Authentication Services; Command Line Specific Extensions; Compression and Archive Extensions; Cryptography Extensions; Database Extensions; Date and Time Related Extensions; File System Related Extensions; Human Language and Character Encoding Support; Image Processing and Generation; Mail Related Extensions; Mathematical Extensions; Non-Text MIME Output; Process Control Extensions; Other Basic Extensions; Other Services; Search Engine Extensions; Server Specific Extensions; Session Extensions; Text Processing; Variable and Type Related Extensions; Web Services; Windows Only Extensions; XML Manipulation; GUI Extensions

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PHP Function List

pdf_begin_document doesn't exist. Closest matches:

mongodb_bson_document
dom_document
domdocument
dom_xmldocument
dom_htmldocument
dom_documenttype
ps_begin_page
solrinputdocument
fdf_get_attachment
ps_findfont
domdocumenttype
solrdocument
pg_consume_input
sodium_increment
ps_begin_pattern
random_engine_secure
dom_documentfragment
pg_socket
ldap_bind_ext
phpdbg_prompt
str_increment
svn_fs_begin_txn2
ps_begin_template
dbase_open
tidy_warning_count
ps_string_geometry
domcomment
sapi_windows_cp_get
domdocumentfragment
phpdbg_break_method

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