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Parameter $error_message

Expected type: String
Description: The error message

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Parameter $error_type

Expected type: Enumerated String
Description: The type of error (used for filtering in the error log)

Possible string values
Allowed values	Description
'critical'	A critical error
'database'	A database-related error
'general'	A generic error (default value)
'template'	A template error, such as a parse error
'undefined_vars'	"Undefined index" and "Undefined variable" errors
'user'	User-specific errors, such as "password incorrect"

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Parameter $file

Expected type: Mixed
Description: The file where this error occurred (either null or the name of a file)

Allowed types for $file
Allowed values	Description
Null	Default value
String	The full path to the file

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Parameter $line

Expected type: Mixed
Description: The line number where this error occurred

Allowed types for $line
Allowed values	Description
Null	Default value
Integer	The line number where the error occurred

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Return value

Expected type: String
Description: Returns the error message with additional information about the file and line number.