PHP outputs all variables / constants / modules / functions / classes of the current process

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1. Get_defined_vars (PHP 4 > = 4.0.4, PHP 5)-gets an array of all defined variables

Array get_defined_vars (void)

This function returns a multidimensional array containing a list of all defined variables, including environment variables, server variables, and user-defined variables.

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2. Get_defined_functions (PHP 4 > = 4.0.4, PHP 5)-gets all defined functions

Array get_defined_functions (void) / / void is empty and no parameters are required

3. Get_loaded_extensions (PHP 4, PHP 5)-get all available modules

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4. Get_extension_funcs (PHP 4, PHP 5)-gets the available functions of the specified module

Array get_extension_funcs (string $module_name) this function returns all the functions available for the specified module. The parameter passed in (module name) must be lowercase

The copy code is as follows:

5. Get_defined_constants (PHP 4 > = 4.1.0, PHP 5)-gets the names of the associative array, all the constants and their values

Array get_defined_constants ([bool $categorize = false])

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6. Get_declared_classes (PHP 4, PHP 5)-gets an array of defined class names

Array get_declared_classes (void)

The copy code is as follows:

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