Feb
26
总结PHP的引号和反斜杠问题
2006-02-26 5:08 pm 作者：萤火虫儿
1. magic_quotes_gpc=on:
\ => \\
‘ => \’
“=> \”
2. 当 \’ 、\” 插入数据库时，字符并没有变化，仍然为 ‘ 和 “。因此读出时无需再次stripslashes。
例外：magic_quotes_runtime=on时。
3. preg_replace的pattern中使用 /e 修正符，则replacement传递到callback函数中的情形为：
\ => \
‘ => ‘
“=> \”
4. 从数据库中读取，当magic_quotes_runtime=off时，似乎 \ => 空 ？
总结：引号和反斜杠的问题很复杂，而且因各服务器的设置不同而千变万化。
现在我的解决方法是
\ => \
引号则用 htmlspecialchars ，quote_style设置为 ENT_QUOTES。
希望SP1版本中贴代码的问题能够解决。
测试：
<?php
error_reporting(E_ALL);
/* 加入重定向以得到标准错误输出 stderr。 */
$handle = popen(’/path/to/spooge 2>&1′, ‘r’);
echo “‘$handle’; “. gettype($handle) . “\n”;
$read = fread($handle, 2096);
echo $read;
pclose($handle);
?>
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