以下代码在通过 CLI 和 Apache/mod_php 运行时产生不同的结果:

<pre>
<?php
error_reporting(E_ALL);
ini_set('display_errors', '1');

echo setlocale(LC_ALL, 0)."\n";
// echo setlocale(LC_ALL, "en_GB.UTF-8")."\n";

$terms = array
(
    //Always matches:
    "Label Generation",
    //Doesn't match when using u (PCRE_UTF8) modifier:
    "Receipt of Prescription and Validation of Patient Information",

);

$text       = "Some terms to match: ".implode(", ",$terms);
$pattern    = "/(".implode(")|(", $terms).")/is";
$regexps    = array
(
   "Unicode"     => $pattern."u", //Add u (PCRE_UTF8) modifier
   "Non-unicode" => $pattern
);

echo "Text:\n'$text'\n";

foreach($regexps as $type=>$regexp)
{
    $matches    = array();
    $total      = preg_match_all($regexp,$text,$matches);

    echo "\n\n";
    echo "$type regex:\n'$regexp'\n\n";
    echo "Total $type matches: ";
    var_dump($total);
    echo "\n$type matches: ";
    var_dump($matches[0]);
}
?>
</pre>

CLI 输出(正确):

<pre>
/en_GB.UTF-8/C/C/C/C/C
Text:
'Some terms to match: Label Generation, Receipt of Prescription and Validation of Patient Information'


Unicode regex:
'/(Label Generation)|(Receipt of Prescription and Validation of Patient Information)/isu'

Total Unicode matches: int(2)

Unicode matches: array(2) {
  [0]=>
  string(16) "Label Generation"
  [1]=>
  string(61) "Receipt of Prescription and Validation of Patient Information"
}


Non-unicode regex:
'/(Label Generation)|(Receipt of Prescription and Validation of Patient Information)/is'

Total Non-unicode matches: int(2)

Non-unicode matches: array(2) {
  [0]=>
  string(16) "Label Generation"
  [1]=>
  string(61) "Receipt of Prescription and Validation of Patient Information"
}
</pre>

Apache/mod_php 网络服务器结果(不正确 - 仅在不使用/u 修饰符时匹配字符串):

/en_GB.ISO8859-1/C/C/C/C/C
Text:
'Some terms to match: Label Generation, Receipt of Prescription and Validation of Patient Information'


Unicode regex:
'/(Label Generation)|(Receipt of Prescription and Validation of Patient Information)/isu'

Total Unicode matches: int(1)

Unicode matches: array(1) {
  [0]=>
  string(16) "Label Generation"
}


Non-unicode regex:
'/(Label Generation)|(Receipt of Prescription and Validation of Patient Information)/is'

Total Non-unicode matches: int(2)

Non-unicode matches: array(2) {
  [0]=>
  string(16) "Label Generation"
  [1]=>
  string(61) "Receipt of Prescription and Validation of Patient Information"
}

当使用/u (PCRE_UTF8) 选项时，网络服务器无法匹配这两个字符串。 我已尝试 setlocale(LC_ALL, "en_GB.UTF-8"); 将 Web 服务器区域设置与 CLI 区域设置相匹配，它成功了，但它对输出没有影响。 我怀疑 PCRE 库有问题，但我不明白 CLI 和 Web 服务器之间有何不同 - PHP 在两种环境中报告相同的库版本: PHP 5.4.14 PCRE(Perl 兼容正则表达式)支持 => 已启用 PCRE 库版本 => 8.32 2012-11-30

pcretest 报告不支持 UTF-8，但尽管如此 CLI 版本产生了正确的结果

$> pcretest -C
PCRE version 8.32 2012-11-30
Compiled with
  8-bit support
  No UTF-8 support
  No Unicode properties support
  No just-in-time compiler support
  Newline sequence is LF
  \R matches all Unicode newlines
  Internal link size = 2
  POSIX malloc threshold = 10
  Default match limit = 10000000
  Default recursion depth limit = 10000000
  Match recursion uses stack

最佳答案

这个 PHP 设置帮助了我:

pcre.jit=0 

关于php - 为什么带有 PCRE_UTF8 的 PHP preg_match_all 在 CLI 上和通过 Apache/mod_php 给出不同的结果？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/19588406/