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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

using-https-github.com/ramsey/array_column doesn't exist. Closest matches:

array_column
com_safearray_proxy
substr_count
ui_controls_colorbutton
sensitiveparametervalue
simdjson_key_count
array_combine
db2_special_columns
geoip_region_name_by_code
iterator_count
stream_socket_client
pg_fetch_all_columns
mb_substr_count
db2_procedure_columns
stream_set_chunk_size
svn_repos_fs_begin_txn_for_commit
tidy_error_count
mongodb_driver_command
array_chunk
stats_rand_setall
runkit7_function_rename
fann_get_train_error_function
unregister_tick_function
ibase_commit
commonmark_node_document
ps_string_geometry
array_count_values
http_response_code
fann_get_connection_array
session_get_cookie_params

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