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Editorial Team
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Asked: 2026-06-02T21:54:42+00:00

I recently upgraded my PHP to version 5.4.1 on my Lion OS X 64bit,

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I recently upgraded my PHP to version 5.4.1 on my Lion OS X 64bit, I’m getting an error thrown in Codeigniter:

Severity: Warning

Message: preg_match(): Compilation failed: unknown option bit(s) set at offset 0

Filename: core/Utf8.php

Line Number: 44

I Googled the problem, this seems to be a problem with the PCRE lib in PHP, well I followed this tutorial which shows to install pcre with homebrew which I did (I’m running pcre 8.30) and this didn’t solve the problem.

I’ve tried looking around for solutions, but I haven’t came across one that helped – is there a method of fixing this PCRE lib problem?

EDIT: Just edited this question to remind me what my installation was:

./configure \
--prefix=/usr \
--mandir=/usr/share/man \
--infodir=/usr/share/info \
--sysconfdir=/private/etc \
--with-apxs2=/usr/sbin/apxs \
--enable-cli \
--with-config-file-path=/etc \
--with-libxml-dir=/usr \
--with-openssl=/usr \
--with-kerberos=/usr \
--with-zlib=/usr \
--enable-bcmath \
--with-bz2=/usr \
--enable-calendar \
--with-curl=/usr \
--enable-dba \
--enable-exif \
--enable-ftp \
--with-gd \
--with-freetype-dir=/usr/X11/ \
--with-jpeg-dir=/usr \
--with-png-dir=/usr/X11/ \
--enable-gd-native-ttf \
--with-icu-dir=/usr \
--with-iodbc=/usr \
--with-ldap=/usr \
--with-ldap-sasl=/usr \
--with-libedit=/usr \
--enable-mbstring \
--enable-mbregex \
--with-mysql=mysqlnd \
--with-mysqli=mysqlnd \
--with-pdo-mysql=mysqlnd \
--with-mysql-sock=/var/mysql/mysql.sock \
--with-readline=/usr \
--enable-shmop \
--with-snmp=/usr \
--enable-soap \
--enable-sockets \
--enable-sysvmsg \
--enable-sysvsem \
--enable-sysvshm \
--with-tidy \
--enable-wddx \
--with-xmlrpc \
--with-iconv-dir=/usr \
--with-xsl=/usr \
--enable-zip \
--with-pgsql=/usr \
--with-pdo-pgsql=/usr \
--with-mcrypt=/usr/local/lib
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1 Answer

  1. Editorial Team

    I was able to get PHP 5.4.1 working with PCRE version 8.12 (which is the version included in PHP 5.4.1 I believe). After all the back and forth listed in the question’s comments, I decided to compile PHP without the PCRE flags and let PHP just use it’s defaults. By using the defaults, it compiles with 8.12.

    Now, a follow up questions is, of course, WHY this happens. I would still expect 8.30 to be compiled with PHP with the flags I provided. But, at this point, I am just happy to have the thing working.

    Below are the config options I got to work in case you want to try it from your end.

    ./configure \
--prefix=/usr \
--mandir=/usr/share/man \
--infodir=/usr/share/info \
--sysconfdir=/private/etc \
--with-apxs2=/usr/local/apache/bin/apxs \
--enable-cli \
--with-config-file-path=/etc \
--with-libxml-dir=/usr \
--with-openssl=/usr \
--with-kerberos=/usr \
--with-zlib=/usr \
--enable-bcmath \
--with-bz2=/usr \
--enable-calendar \
--with-curl=/usr \
--enable-dba \
--enable-exif \
--enable-ftp \
--with-gd \
--with-freetype-dir=/usr/X11/ \
--with-jpeg-dir=/usr \
--with-png-dir=/usr/X11/ \
--enable-gd-native-ttf \
--with-icu-dir=/usr \
--with-iodbc=/usr \
--with-ldap=/usr \
--with-ldap-sasl=/usr \
--with-libedit=/usr \
--enable-mbstring \
--enable-mbregex \
--with-mysql=mysqlnd \
--with-mysqli=mysqlnd \
--with-pdo-mysql=mysqlnd \
--with-mysql-sock=/var/mysql/mysql.sock \
--with-readline=/usr \
--enable-shmop \
--with-snmp=/usr \
--enable-soap \
--enable-sockets \
--enable-sysvmsg \
--enable-sysvsem \
--enable-sysvshm \
--with-tidy \
--enable-wddx \
--with-xmlrpc \
--with-iconv-dir=/usr \
--with-xsl=/usr \
--enable-zip \
--with-pgsql=/usr \
--with-pdo-pgsql=/usr \
--with-mcrypt=/usr
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