Difference between revisions of "PHP"
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===Error Messages=== | ===Error Messages=== | ||
''some of these are not found in the PHP documentation'' | ''some of these are not found in the PHP documentation'' | ||
| − | * '''REG_ERANGE''': This error appears to originate in the [[regex]] library, and means "Invalid character range, e.g. ending point is earlier in the collating order than the starting point." | + | * '''REG_EMPTY''': [[regex]]-related, but not sure what it means; it may reflect a difference between Perl-style regex (preg_* functions) and grep-style regex (ereg* functions). I changed the expression "('|")" to "['"]", and this seemed to solve the problem. |
| + | * '''REG_ERANGE''': This error appears to originate in the [[regex]] library, and means "Invalid character range, e.g. ending point is earlier in the collating order than the starting point." (Documented [http://www.laurikari.net/tre/api.html here]) | ||
** In one case, this was caused by having a forward-slash ("/") in the bracketed list of possible characters; escaping the forward slash fixed the problem. | ** In one case, this was caused by having a forward-slash ("/") in the bracketed list of possible characters; escaping the forward slash fixed the problem. | ||
Revision as of 16:11, 30 September 2007
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PHP is an interpreted language most commonly used in web sites.
Reference
Related Articles
Related Things
Coding Resources
Users Groups
Links
- 2006-07-22 Why Global Variables in PHP is Bad Programming Practice
- Experiences of Using PHP in Large Websites
- un-PHP-ing my web site: a LiveJournal entry critical of PHP
Notes
One of the major weaknesses of PHP as a serious programming language is its lack of any way to require variable declaration before usage -- the equivalent of "use strict;" in Perl or "Option Explicit" in Visual Basic. Here is a brief discussion of this problem, with a workaround which might be useful in some situations (but not if you need to turn off warnings for other reasons, such as needing to suppress messages about duplicate http headers).
Error Messages
some of these are not found in the PHP documentation
- REG_EMPTY: regex-related, but not sure what it means; it may reflect a difference between Perl-style regex (preg_* functions) and grep-style regex (ereg* functions). I changed the expression "('|")" to "['"]", and this seemed to solve the problem.
- REG_ERANGE: This error appears to originate in the regex library, and means "Invalid character range, e.g. ending point is earlier in the collating order than the starting point." (Documented here)
- In one case, this was caused by having a forward-slash ("/") in the bracketed list of possible characters; escaping the forward slash fixed the problem.