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PHP Tutorials & HowTos

PHP is an open-source server-side scripting language and one of the most popular in web development. This section includes PHP programming related syntax, questions and answers ( rss feed ).

Explain: php_self or $_SERVER[‘PHP_SELF’] Usage

Can you explain usage of predefined variables called $_SERVER[‘PHP_SELF’]?
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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?
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PHP: Stop Notice and Variable Warnings in Error Log Files

I‘m using PHP 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?
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Domain Redirection Using a PHP Script

Q. How do I redirect my domain name using a php server side scripting under Apache web server?
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PHP Find / Extract Substrings

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?
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PHP Send Email

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?
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PHP Not Accepting <? Tag; Only Accepting <?php and <script> Tag

I am using PHP along with the latest version of Apache web-server. Only <?php and <script> tags are recognized by my LAMP setup. Many of my scripts are broken. How do I allow the <? tag also?
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FreeBSD: Install PHP xcache Opcode Cacher

Q. How do I install and configure xcache under FreeBSD operating systems for Apache, lighttpd or ngnix web server?
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Freebsd makeinfo: not found Error and Solution

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?
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PHP: Verify And Sanitize Email Address

Q. How do I verify input data such as email address under PHP programming language?
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