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PHP 8.5.0 Alpha 4 available for testing

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

domnode-insert-before doesn't exist. Closest matches:

domnodelist
dom_nodelist
commonmark_node_linebreak
domnode
random_engine_secure
dom_node
mongodb_driver_writeerror
mongodb_driver_server
mongodb_bson_iterator
dom_namespaceinfo
swoole_server
ibase_restore
mongodb_driver_writeresult
generator
connection_aborted
opensslcertificate
oci_new_descriptor
random_randomerror
db2_conn_error
bind_textdomain_codeset
dba_insert
uconverter
domcomment
swoole_redis_server
rnp_op_generate_key
mongodb_bson_maxkeyinterface
domcdatasection
mb_detect_order
domprocessinginstruction
mongodb_bson_persistable

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