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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

https:/github.com/php/doc-/blob/master/manual/en/images/logos/php-logo-white.svg doesn't exist. Closest matches:

http_get_last_response_headers
commonmark_interfaces_ivisitable
php_strip_whitespace
odbc_connection_string_should_quote
commonmark_node_image
mcrypt_module_get_supported_key_sizes
commonmark_interfaces_ivisitor
mongodb_driver_monitoring_topologyclosedevent
mongodb_driver_monitoring_topologyopeningevent
mongodb_driver_monitoring_topologychangedevent
http_clear_last_response_headers
hrtime_performancecounter
libxml_set_external_entity_loader
ps_open_image_file
mb_internal_encoding
cubrid_close_request
ps_close_image
swoole_async_dns_lookup
ssh2_methods_negotiated
commonmark_render_latex
mcrypt_module_get_algo_key_size
mongodb_driver_monitoring_logsubscriber
libxml_get_external_entity_loader
wkhtmltox_image_converter
commonmark_node_paragraph
ibase_name_result
mcrypt_enc_get_supported_key_sizes
libxml_use_internal_errors
trader_cdlgapsidesidewhite
intlrulebasedbreakiterator

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