Frequently Asked Questions About Linux / UNIX » PHP

PHP: Tags Not Working in PHP 5.3.x under UNIX / Linux

Vivek Gite — Tue, 18 Jan 2011 11:19:14 +0000

I've recently installed php 5.3.5 in my UNIX box and my old working php code not working. It displays code in pages which is in <? ... my code ... ?> php tags. How do I fix this problem?

Linux: phpinfo() system’s timezone error date.timezone

Vivek Gite — Tue, 18 Jan 2011 00:58:05 +0000

I'm getting the following errors in my log file whenever I use phpinfo() function:

[10-Jan-2011 18:39:08] PHP Warning: phpinfo(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'America/Chicago' for 'CST/-6.0/no DST' instead in /home/servers/http/dev/testpc.php on line 2

How do I fix this problem under UNIX / Linux php running Apache or lighttpd web server?

Mediawiki Fix Internal Server Host Names / Redirection In shared Hosting or Proxy Setup

Vivek Gite — Sun, 19 Dec 2010 21:57:17 +0000

Our customer support wiki runs on an internal host (ip:192.168.1.100:300, hostname a-node100.:300) and it is behind the nginx reverse proxy server. However, our Apache server end up displaying internal server name http://a-node100.:300/, which results into an unexpected redirection and timeouts as http://a-node100.:300/ is not accessible over the Internet. How do I force nginx or apache to use the base URL of our server (http://support.example.com/wiki/)?

WordPress Rename Image URL For a CDN Usage

Vivek Gite — Sat, 20 Nov 2010 20:41:47 +0000

Recently, we moved all our static assets to a CDN as described here. However, we have over 8000+ old blog posts and we need to point static images url to our CDN account hosted at http://MyACCOUNT.cloudfront.net/images/ folder. How do I rename all image urls stored in wordpress posts? How do I offload static images to a CDN urls under Wordpress?

Linux / UNIX: PHP mail() Error Log File

Vivek Gite — Fri, 12 Nov 2010 20:58:55 +0000

How do I view PHP mail() errors? How do I see php mail() error log file under UNIX or Linux?

WordPress Install Memcached Object Cache Plugin To Speed Up Blog

Vivek Gite — Mon, 13 Sep 2010 09:32:59 +0000

How do I install memcached cache plugin under UNIX / Linux to speed up my dynamic database-driven wordpress blog by caching data and objects in RAM to reduce the number of times an external data source must be read?

PHP Increase Upload File Size Limit

Vivek Gite — Fri, 11 Jun 2010 12:06:23 +0000

How do I increase upload file limit from 2MB to 10MB under Apache 2 UNIX / Linux web server?

PHP Security: Limit Resources Used By Script

Vivek Gite — Sun, 07 Feb 2010 18:01:12 +0000

How do I control and put limits on php scripts such as maximum execution time of each script and upload file size?

RHEL / CentOS Xcache: /usr/include/php/ext/date/lib/timelib_structs.h:24:28: error: timelib_config.h: No such file or directory Error and Soultion

Vivek Gite — Thu, 24 Dec 2009 15:43:53 +0000

I'm trying to configure and install xcache under CentOS / Redhat enterprise Linux v5.4 and getting the following error:

/usr/include/php/ext/date/lib/timelib_structs.h:24:28: error: timelib_config.h: No such file or directory

How do I fix this problem and install xcache?

PHP Fatal error: Allowed Memory Size of 20971520 Bytes exhausted (tried to allocate 131072 bytes) Error and Solution

Vivek Gite — Mon, 23 Nov 2009 12:31:29 +0000

I've brand new Ubuntu Linux server (Apache + PHP5 FastCGI + Lighttpd image only server) installed for my wordpress, mediawiki and vBullietin software. I can load forntpage but user cannot edit any wiki pages or post anything and I get the following error in log file:

PHP Fatal error: Allowed Memory Size of 20971520 Bytes exhausted (tried to allocate 131072 bytes) in /usr/share/mediawiki/includes/OutputHandler.php on line 81

How do I fix this problem?

PHP Add Captcha Protection To Web Forms

Vivek Gite — Wed, 24 Jun 2009 09:37:59 +0000

I own a small business website. However, bots started to abusing my forms such as contact.php. How do I stop bots bots from abusing my site? How do I tell if PHP form is submitted by a person or a script?

Explain: php_self or $_SERVER['PHP_SELF'] Usage

Vivek Gite — Wed, 18 Mar 2009 21:11:54 +0000

Can you explain usage of predefined variables called $_SERVER['PHP_SELF']?

FreeBSD pkg_add: warning: package php5-pcre-5.2.6_2 requires php5-5.2.8, but php5-pcre-5.2.6_2 is installed

Vivek Gite — Mon, 22 Dec 2008 02:51:59 +0000

Q. I'm trying to upgrade my PHP version from 5.2.6 to 5.2.8 using portupgrade command. But I'm getting following errors:

*** Error code 1 Stop in /usr/ports/lang/php5. *** Error code 1 Stop in /usr/ports/lang/php5. *** Error code 1 Stop in /usr/ports/lang/php5. ** Command failed [exit code 1]: /usr/bin/script -qa /tmp/portupgrade.42275.0 env UPGRADE_TOOL=portupgrade UPGRADE_PORT=php5-pcre-5.2.6_2 UPGRADE_PORT_VER=5.2.6_2 make reinstall ---> Restoring the old version pkg_add: warning: package 'php5-pcre-5.2.6_2' requires 'php5-5.2.8', but 'php5-pcre-5.2.6_2' is installed ** Fix the installation problem and try again. [Updating the pkgdb in /var/db/pkg ... - 62 packages found (-0 +1) . done] ** Listing the failed packages (-:ignored / *:skipped / !:failed) ! lang/php5 (php5-pcre-5.2.6_2) (install error)

How do I fix this problem and upgrade php5-pcre?

PHP: Stop Notice and Variable Warnings in Error Log Files

Vivek Gite — Sat, 20 Dec 2008 13:27:33 +0000

Q. I'm using error logging in place of error displaying on production web sites. However, I do not want to see error messages about the use of uninitialized variables. I'd like to see all critical errors, except for notices and coding standards warnings. How do I disable error messages?

Domain Redirection Using a PHP Script

Vivek Gite — Thu, 18 Dec 2008 20:11:48 +0000

Q. How do I redirect my domain name using a php server side scripting under Apache web server?

PHP Find / Extract Substrings

Vivek Gite — Sat, 25 Oct 2008 13:42:19 +0000

Q. How do I find out if a string stored in a variable contains a particular substring using PHP? How do I find out (extract) first 5 character of a particular string using Apache and PHP?

PHP Send Email

Vivek Gite — Mon, 20 Oct 2008 17:51:23 +0000

Q. How do I send an email using PHP and Apache webserver under Linux / UNIX operating systems? How do I send email from a PHP Script?

PHP Not Accepting Tag

Vivek Gite — Mon, 06 Oct 2008 11:29:53 +0000

Q. I'm using PHP along with latest version of Apache. Only <?php and <script> tags are recognized. Many of my scripts are broken. How do I allow the <? tag also?

FreeBSD: Install PHP xcache Opcode Cacher

Vivek Gite — Sat, 04 Oct 2008 09:00:13 +0000

Q. How do I install and configure xcache under FreeBSD operating systems for Apache, lighttpd or ngnix web server?

Freebsd makeinfo: not found Error and Solution

Vivek Gite — Fri, 03 Oct 2008 21:22:49 +0000

Q. I'm trying to build PHP5 under FreeBSD jail and I'm getting an error that read as follows:

m4.info-[0-9][0-9] ./m4.i[0-9] ./m4.i[0-9][0-9]; do if test -f $f; then mv $f $backupdir; restore=mv; else :; fi; done; else :; fi && cd "$am__cwd"; if makeinfo --no-split -I . -o ./m4.info ./m4.texinfo; then rc=0; cd .; else rc=$?; cd . && $restore $backupdir/* `echo "././m4.info" | sed 's|[^/]*$||'`; fi; rm -rf $backupdir; exit $rc makeinfo: not found *** Error code 127 Stop in /usr/ports/devel/m4. *** Error code 1 Stop in /usr/ports/devel/autoconf262. *** Error code 1 Stop in /usr/ports/lang/php5. *** Error code 1

How do I get rid of this problem and compile applications?