examplep上的SimplePie的1.3开发版本，带有PHP 5.3。
我可以获得RSS提要并显示它，但我对每一个提取的项目都会出现以下错误：
警告：preg_match（）[function.preg match]：编译失败：在第5877行的C:''examplep''htdocs''simplepie.php中偏移562处没有可重复的内容
警告：preg_match（）[function.preg match]：编译失败：在第5965 行C:''examplep''htdocs''simplepie.php中偏移509处没有可重复的内容
警告：preg_match（）[function.preg match]：编译失败：在第6031行的C:''examplep''htdocs''simplepie.php中偏移509处没有可重复的内容
发生错误的功能：
/**
* Parse RFC2822's date format
*
* @access protected
* @return int Timestamp
*/
public function date_rfc2822($date)
{
static $pcre;
if (!$pcre)
{
$wsp = '['x09'x20]';
$fws = '(?:' . $wsp . '+|' . $wsp . '*(?:'x0D'x0A' . $wsp . '+)+)';
$optional_fws = $fws . '?';
$day_name = $this->day_pcre;
$month = $this->month_pcre;
$day = '([0-9]{1,2})';
$hour = $minute = $second = '([0-9]{2})';
$year = '([0-9]{2,4})';
$num_zone = '([+'-])([0-9]{2})([0-9]{2})';
$character_zone = '([A-Z]{1,5})';
$zone = '(?:' . $num_zone . '|' . $character_zone . ')';
$pcre = '/(?:' . $optional_fws . $day_name . $optional_fws . ',)?' . $optional_fws . $day . $fws . $month . $fws . $year . $fws . $hour . $optional_fws . ':' . $optional_fws . $minute . '(?:' . $optional_fws . ':' . $optional_fws . $second . ')?' . $fws . $zone . '/i';
}
if (preg_match($pcre, $this->remove_rfc2822_comments($date), $match))
/**
* Parse RFC850's date format
*
* @access protected
* @return int Timestamp
*/
public function date_rfc850($date)
{
static $pcre;
if (!$pcre)
{
$space = '['x09'x20]+';
$day_name = $this->day_pcre;
$month = $this->month_pcre;
$day = '([0-9]{1,2})';
$year = $hour = $minute = $second = '([0-9]{2})';
$zone = '([A-Z]{1,5})';
$pcre = '/^' . $day_name . ',' . $space . $day . '-' . $month . '-' . $year . $space . $hour . ':' . $minute . ':' . $second . $space . $zone . '$/i';
}
if (preg_match($pcre, $date, $match))
/**
* Parse C99's asctime()'s date format
*
* @access protected
* @return int Timestamp
*/
public function date_asctime($date)
{
static $pcre;
if (!$pcre)
{
$space = '['x09'x20]+';
$wday_name = $this->day_pcre;
$mon_name = $this->month_pcre;
$day = '([0-9]{1,2})';
$hour = $sec = $min = '([0-9]{2})';
$year = '([0-9]{4})';
$terminator = ''x0A?'x00?';
$pcre = '/^' . $wday_name . $space . $mon_name . $space . $day . $space . $hour . ':' . $min . ':' . $sec . $space . $year . $terminator . '$/i';
}
if (preg_match($pcre, $date, $match))
错误引用的行是每个函数的最后一个if表达式（您可以在此处看到完整的代码）。
我认为每个函数的$pcre中都有一个糟糕的正则表达式。
感谢
如果正则表达式有任何问题，就不应该编译
但是，$this->day_pcre和$this->month_pcre可能包含可能使正则表达式变差的元字符。最好检查一下。
我用"Mon"answers"Oct"代替，并在Ideone上运行。似乎有效。
顺便说一句，你可能想兑换$fws-
来自$fws = '(?:' . $wsp . '+|' . $wsp . '*(?:'x0D'x0A' . $wsp . '+)+)'
至$fws = '(?:(?:(?:'x0D'x0A)?' . $wsp . ')+)'
因为它们是等效的并且可能更高效。
在函数中，应该打印出
的正则表达式$day/$month/$pcre变量。您还能指望如何调试它？
可能是别的原因，我不知道。
以下是我得到的：http://ideone.com/zJ5vE
代码
<?php
date_asctime( "Mon Oct 21 11:21:31 2012'x0A" );
date_asctime( "Mon Oct 22 12:22:32 2012'x0A" );
date_asctime( "Mon Oct 23 13:23:33 2012'x0A" );
print("=================='n");
date_rfc2822( 'Mon, 21 Oct 2012 21:01 -1011' );
date_rfc2822( 'Mon, 22 Oct 2012 22:02 -1012' );
date_rfc2822( 'Mon, 23 Oct 2012 23:03 -1013' );
/**
* Parse C99's asctime()'s date format
*
* @access protected
* @return int Timestamp
*/
function date_asctime($date)
{
static $pcre;
if (!$pcre)
{
$space = '['x09'x20]+';
$wday_name = 'Mon'; //$this->day_pcre;
$mon_name = 'Oct'; //$this->month_pcre;
$day = '([0-9]{1,2})';
$hour = $sec = $min = '([0-9]{2})';
$year = '([0-9]{4})';
$terminator = ''x0A?'x00?';
$pcre = '/^' . $wday_name . $space . $mon_name . $space . $day . $space . $hour . ':' . $min . ':' . $sec . $space . $year . $terminator . '$/i';
}
if (preg_match($pcre, $date, $match))
{
print_r($match);
}
}
/**
* Parse RFC2822's date format
*
* @access protected
* @return int Timestamp
*/
function date_rfc2822($date)
{
static $pcre;
if (!$pcre)
{
$wsp = '['x09'x20]';
// $fws = '(?:' . $wsp . '+|' . $wsp . '*(?:'x0D'x0A' . $wsp . '+)+)';
$fws = '(?:(?:(?:'x0D'x0A)?' . $wsp . ')+)';
$optional_fws = $fws . '?';
$day_name = 'Mon'; //$this->day_pcre;
$month = 'Oct'; //$this->month_pcre;
$day = '([0-9]{1,2})';
$hour = $minute = $second = '([0-9]{2})';
$year = '([0-9]{2,4})';
$num_zone = '([+'-])([0-9]{2})([0-9]{2})';
$character_zone = '([A-Z]{1,5})';
$zone = '(?:' . $num_zone . '|' . $character_zone . ')';
$pcre = '/(?:' . $optional_fws . $day_name . $optional_fws . ',)?' . $optional_fws . $day . $fws . $month . $fws . $year . $fws . $hour . $optional_fws . ':' . $optional_fws . $minute . '(?:' . $optional_fws . ':' . $optional_fws . $second . ')?' . $fws . $zone . '/i';
}
// if (preg_match($pcre, $this->remove_rfc2822_comments($date), $match))
if (preg_match($pcre, $date, $match))
{
print_r($match);
}
}
?>
输出
Array
(
[0] => Mon Oct 21 11:21:31 2012
[1] => 21
[2] => 11
[3] => 21
[4] => 31
[5] => 2012
)
Array
(
[0] => Mon Oct 22 12:22:32 2012
[1] => 22
[2] => 12
[3] => 22
[4] => 32
[5] => 2012
)
Array
(
[0] => Mon Oct 23 13:23:33 2012
[1] => 23
[2] => 13
[3] => 23
[4] => 33
[5] => 2012
)
==================
Array
(
[0] => Mon, 21 Oct 2012 21:01 -1011
[1] => 21
[2] => 2012
[3] => 21
[4] => 01
[5] =>
[6] => -
[7] => 10
[8] => 11
)
Array
(
[0] => Mon, 22 Oct 2012 22:02 -1012
[1] => 22
[2] => 2012
[3] => 22
[4] => 02
[5] =>
[6] => -
[7] => 10
[8] => 12
)
Array
(
[0] => Mon, 23 Oct 2012 23:03 -1013
[1] => 23
[2] => 2012
[3] => 23
[4] => 03
[5] =>
[6] => -
[7] => 10
[8] => 13
)