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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

opcache.save_comments doesn't exist. Closest matches:

opcache_reset
opcache_compile_file
ocifetchstatement
opcache_get_configuration
opcache_get_status
dom_comment
ibase_commit
wincache_scache_meminfo
class_implements
oci_commit
domcomment
svn_commit
opcache_invalidate
wincache_ucache_exists
wincache_ucache_meminfo
wincache_ocache_meminfo
parallel_events
wincache_ucache_get
odbc_commit
apache_note
wincache_ucache_cas
ob_get_contents
wincache_fcache_meminfo
openal_device_close
opcache_is_script_cached
svn_fs_file_contents
pg_fetch_all_columns
wincache_scache_info
ibase_commit_ret
ocistatementtype

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