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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-defuse.ca/php-pbkdf2.htm doesn't exist. Closest matches:

hash_pbkdf2
stats_dens_cauchy
openssl_pbkdf2
stats_dens_beta
array_uintersect
eventhttprequest
stats_dens_gamma
stats_dens_exponential
ignore_user_abort
stats_rand_gen_funiform
stats_dens_laplace
stats_dens_t
stats_dens_f
stats_dens_weibull
underflowexception
stats_dens_uniform
http_response_code
swoole_http_request
stats_rand_get_seeds
stats_dens_chisquare
outofboundsexception
get_defined_functions
ui_controls_separator
enchant_dict_describe
pg_escape_bytea
array_intersect
quickhashintset
ui_draw_text_font_descriptor
array_uintersect_assoc
stats_dens_pmf_poisson

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