Question

我有两个阵列：

$array_plugins  = array(
            array( 'captcha\/captcha.php', 'Captcha', 'http://wordpress.org/extend/plugins/captcha/', 'http://bestwebsoft.com/plugin/captcha-plugin/', '/wp-admin/plugin-install.php?tab=search&type=term&s=Captcha+bestwebsoft&plugin-search-input=Search+Plugins', 'admin.php?page=captcha.php' ), 
            array( 'contact-form-plugin\/contact_form.php', 'Contact Form', 'http://wordpress.org/extend/plugins/contact-form-plugin/', 'http://bestwebsoft.com/plugin/contact-form/', '/wp-admin/plugin-install.php?tab=search&type=term&s=Contact+Form+bestwebsoft&plugin-search-input=Search+Plugins', 'admin.php?page=contact_form.php' ), 
            array( 'facebook-button-plugin\/facebook-button-plugin.php', 'Facebook Like Button Plugin', 'http://wordpress.org/extend/plugins/facebook-button-plugin/', 'http://bestwebsoft.com/plugin/facebook-like-button-plugin/', '/wp-admin/plugin-install.php?tab=search&type=term&s=Facebook+Like+Button+Plugin+bestwebsoft&plugin-search-input=Search+Plugins', 'admin.php?page=facebook-button-plugin.php' ), 
            array( 'twitter-plugin\/twitter.php', 'Twitter Plugin', 'http://wordpress.org/extend/plugins/twitter-plugin/', 'http://bestwebsoft.com/plugin/twitter-plugin/', '/wp-admin/plugin-install.php?tab=search&type=term&s=Twitter+Plugin+bestwebsoft&plugin-search-input=Search+Plugins', 'admin.php?page=twitter.php' ), 
            array( 'portfolio\/portfolio.php', 'Portfolio', 'http://wordpress.org/extend/plugins/portfolio/', 'http://bestwebsoft.com/plugin/portfolio-plugin/', '/wp-admin/plugin-install.php?tab=search&type=term&s=Portfolio+bestwebsoft&plugin-search-input=Search+Plugins', '' ),
            array( 'gallery-plugin\/gallery-plugin.php', 'Gallery', 'http://wordpress.org/extend/plugins/gallery-plugin/', 'http://bestwebsoft.com/plugin/gallery-plugin/', '/wp-admin/plugin-install.php?tab=search&type=term&s=Gallery+Plugin+bestwebsoft&plugin-search-input=Search+Plugins', '' ),
            array( 'adsense-plugin\/adsense-plugin.php', 'Google AdSense Plugin', 'http://wordpress.org/extend/plugins/adsense-plugin/', 'http://bestwebsoft.com/plugin/google-adsense-plugin/', '/wp-admin/plugin-install.php?tab=search&type=term&s=Adsense+Plugin+bestwebsoft&plugin-search-input=Search+Plugins', 'admin.php?page=adsense-plugin.php' ),
            array( 'custom-search-plugin\/custom-search-plugin.php', 'Custom Search Plugin', 'http://wordpress.org/extend/plugins/custom-search-plugin/', 'http://bestwebsoft.com/plugin/custom-search-plugin/', '/wp-admin/plugin-install.php?tab=search&type=term&s=Custom+Search+plugin+bestwebsoft&plugin-search-input=Search+Plugins', 'admin.php?page=custom_search.php' ),
            array( 'quotes_and_tips\/quotes-and-tips.php', 'Quotes and Tips', 'http://wordpress.org/extend/plugins/quotes-and-tips/', 'http://bestwebsoft.com/plugin/quotes-and-tips/', '/wp-admin/plugin-install.php?tab=search&type=term&s=Quotes+and+Tips+bestwebsoft&plugin-search-input=Search+Plugins', 'admin.php?page=quotes-and-tips.php' )
        );

和

Array ( [0] => advanced-code-editor/advanced-code-editor.php [1] => bigarray.php [2] => jamie-social-icons/jamie-social_icons.php [3] => nowwhat.php [4] => twitter-plugin/twitter.php )

当我使用代码时......

foreach($array_plugins as $plugins) {
          if( 0 < count( preg_grep( "/".$plugins[0]."/", $active_plugins ) ) ) {
                echo "hit";

结果我得到一个“命中”。为什么preg_grep认为"twitter-plugin/twitter.php"和"twitter-plugin\/twitter.php"是相同的字符串？

Answer 1

这是因为\具有特殊含义，用于转义元字符（请参阅wiki article on escaping）。例如，如果您想要文字匹配[，则需要像\[一样将其转义（如果您想匹配\，那么您也需要将其转义=＆gt ; \\）。对于非元字符，转义不会使\a等于a和\/等于\/。

要在代码中修复此问题，只需替换

即可

preg_grep( "/".$plugins[0]."/", $active_plugins )

带

preg_grep( "/". str_replace('\\', '\\\\', $pattern[0]) ."/", $active_plugins )

（这里的双\\也是因为逃脱了。）

Preg Grep和Backslashes

1 个答案: