75 lines
2.2 KiB
PHP
75 lines
2.2 KiB
PHP
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<?php
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/**
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* This is the dynamic loader for the library. It checks whether you have
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* the mbstring extension available and includes relevant files
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* on that basis, falling back to the native (as in written in PHP) version
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* if mbstring is unavailabe.
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*
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* It's probably easiest to use this, if you don't want to understand
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* the dependencies involved, in conjunction with PHP versions etc. At
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* the same time, you might get better performance by managing loading
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* yourself. The smartest way to do this, bearing in mind performance,
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* is probably to "load on demand" - i.e. just before you use these
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* functions in your code, load the version you need.
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*
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* It makes sure the the following functions are available;
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* utf8_strlen, utf8_strpos, utf8_strrpos, utf8_substr,
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* utf8_strtolower, utf8_strtoupper
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* Other functions in the ./native directory depend on these
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* six functions being available
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* @package utf8
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*/
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/**
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* Put the current directory in this constant
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*/
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if ( !defined('UTF8') ) {
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define('UTF8',dirname(__FILE__));
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}
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/**
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* If string overloading is active, it will break many of the
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* native implementations. mbstring.func_overload must be set
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* to 0, 1 or 4 in php.ini (string overloading disabled).
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* Also need to check we have the correct internal mbstring
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* encoding
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*/
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if ( extension_loaded('mbstring')) {
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if ( ini_get('mbstring.func_overload') & MB_OVERLOAD_STRING ) {
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trigger_error('String functions are overloaded by mbstring',E_USER_ERROR);
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}
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mb_internal_encoding('UTF-8');
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}
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/**
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* Check whether PCRE has been compiled with UTF-8 support
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*/
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$UTF8_ar = array();
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if ( preg_match('/^.{1}$/u',"ñ",$UTF8_ar) != 1 ) {
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trigger_error('PCRE is not compiled with UTF-8 support',E_USER_ERROR);
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}
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unset($UTF8_ar);
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/**
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* Load the smartest implementations of utf8_strpos, utf8_strrpos
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* and utf8_substr
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*/
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if ( !defined('UTF8_CORE') ) {
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if ( function_exists('mb_substr') ) {
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require_once UTF8 . '/mbstring/core.php';
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} else {
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require_once UTF8 . '/utils/unicode.php';
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require_once UTF8 . '/native/core.php';
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}
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}
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/**
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* Load the native implementation of utf8_substr_replace
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*/
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require_once UTF8 . '/substr_replace.php';
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/**
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* You should now be able to use all the other utf_* string functions
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*/
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