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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

function.messageclasstostring doesn't exist. Closest matches:

imagecreatefromstring
reflectionclassconstant
imagestring
getimagesizefromstring
function_exists
imagestringup
reflectionclass
reflectiongenerator
badfunctioncallexception
openssl_error_string
imagecolorstotal
quickhashintstringhash
fann_descale_train
convert_cyr_string
reflectionexception
reflectionattribute
imagecolorsforindex
mysql_escape_string
fann_save_train
fdf_save_string
php_incomplete_class
mysqli_escape_string
ui_exception_runtimeexception
pg_escape_string
reflectionmethod
cubrid_real_escape_string
highlight_string
fann_merge_train_data
imagesettile
func_get_arg

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