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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

calendar-https-github.com/php/doc-en/blob/master/reference/array/functions/in-array.xml doesn't exist. Closest matches:

fann_get_connection_array
ldap_count_references
invalidargumentexception
phpdbg_break_function
scoutapm_list_instrumented_functions
unregister_tick_function
intldatepatterngenerator
eventhttpconnection
ldap_parse_reference
componere_definition
ldap_first_reference
get_defined_functions
commonmark_render_xml
readline_completion_function
solrillegalargumentexception
fann_set_cascade_candidate_change_fraction
fann_get_cascade_candidate_change_fraction
register_tick_function
commonmark_render_html
componere_abstract_definition
http_get_last_response_headers
fann_get_sarprop_step_error_threshold_factor
fann_set_sarprop_step_error_threshold_factor
fann_get_connection_rate
mongodb_driver_clientencryption
solrmissingmandatoryparameterexception
xmlrpc_server_register_introspection_callback
xmlrpc_parse_method_descriptions
commonmark_interfaces_ivisitable
hrtime_performancecounter

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