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PHP 8.1.31 Released!

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

xmlwriter_write_pi doesn't exist. Closest matches:

xmlwriter
xml_parser_create_ns
xml_parser_create
xml_parser_get_option
xml_parser_set_option
xml_parser_free
mcrypt_create_iv
xmlrpc_server_create
eio_write
dio_write
mongodb_driver_writeerror
mongodb_driver_writeresult
readline_write_history
stream_filter_register
mongodb_driver_writeconcern
trader_wclprice
mysql_insert_id
shmop_write
is_writable
pg_lo_write
filter_list
xml_error_string
xmldiff_file
mqseries_inq
socket_write
filter_input
is_writeable
mqseries_put
cubrid_lock_write
simplexmliterator

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