Programming PHP

eregi
int eregi(string pattern,string string[, array matches])
Searches string for the regular expression pattern (the pattern matching is case-insensitive).
If given, the array matches is filled with the subpattern matches. Returns true if the
pattern matched in string and false if not. See Chapter 4 for more information on using
regular expressions. This is a case-insensitive version of ereg( ).
eregi_replace
string ereg_replace(string pattern, string replace, string string)
Searches for all occurrences of the regular expression pattern in string, replaces them with
replace, and returns the result. The pattern matching is case-insensitive. This is a caseinsensitive
version of ereg_replace( ).
error_log
int error_log(string message, int type[, string destination[, string headers]])
Records an error message to the web server’s error log, to an email address, or to a file. The
first parameter is the message to log. The type is one of the following:
0 message is sent to the PHP system log; the message is put into the file
pointed at by the error_log configuration directive.
1 message is sent to the email address destination. If specified, headers
provides optional headers to use when creating the message (see mail for
more information on the optional headers).
3 Appends message to the file destination.
error_reporting
int error_reporting([int level])
Sets the level of errors reported by PHP to level and returns the current level; if level is
omitted, the current level of error reporting is returned. The following values are available
for the function:
E_ERROR Runtime warnings
E_WARNING Runtime warnings
E_PARSE Compile-time parse errors
E_NOTICE Runtime notices
E_CORE_ERROR Errors generated internally by PHP
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