PHP

Computing: Software: PHP

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PHP is an interpreted language most commonly used in web sites.

Reference

• Official PHP Website
• Wikipedia
• PHP Wiki

Related Articles

• Perl vs. PHP
• register_globals

Related Things

Coding Resources

• PHP Extension and Application Repository (PEAR)
  • official web site

Users Groups

• Triangle PHP Users Group: The Triangle, NC

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_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."
  • 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.