\u5982\u679c\u8981\u5e76\u53d1\u8bfb\u53d6\u3001\u5199\u5165\u4e00\u4e2a\u6587\u4ef6\uff0c\u5c31\u8981\u5bf9\u6587\u4ef6\u52a0\u9501\uff0c\u9632\u6b62\u8bfb\u3001\u5199\u6df7\u4e71\uff0c\u9020\u6210\u7ed3\u679c\u6709\u8bef\uff0cphp\u4f7f\u7528\u51fd\u6570 bool flock(int handle, int operation, int &wouldlock)\u51fd\u6570\u5bf9\u6587\u4ef6\u52a0\u9501<\/p>\n
<\/p>\n
\uff0c\u8be6\u7ec6\u5982\u4e0b\u9762\u7684\u4f8b\u5b50\uff1a<\/p>\n
<html>\n<head>\n <title>\n \u7559\u8a00\u677f\n <\/title>\n<\/head>\n<body>\n<?php\n \/**\n * \u5982\u679c\u9700\u8981\u5e76\u53d1\u8bfb\u53d6\u67d0\u6587\u4ef6\uff0c\u95ee\u4e86\u9632\u6b62\u8bfb\u5199\u6df7\u4e71\uff0c\u5c31\u8981\u5bf9\u6253\u5f00\u7684\u6587\u4ef6\u52a0\u9501\n * bool flock(int handle, int operation, int &wouldblock)\u51fd\u6570\u53ef\u4ee5\u5bf9\u6587\u4ef6\u52a0\u9501\n * handle\u662f\u4e00\u4e2a\u6587\u4ef6\u6307\u9488\uff0coperation\u6307\u5b9a\u9501\u7684\u7c7b\u578b\uff0c\u9501\u7684\u7c7b\u578b\u5305\u62ec\uff1a\n * LOCK_SH \u5171\u4eab\u9501\uff0c\u8bfb\u53d6\u6587\u4ef6\u65f6\u4f7f\u7528\n * LOCK_EX \u72ec\u5360\u9501\uff0c\u5199\u5165\u6587\u4ef6\u65f6\u4f7f\u7528\n * LOCK_UN \u91ca\u653e\u9501\uff0c\u4e0a\u9762\u4e24\u79cd\u9501\u90fd\u7528\u5b83\u6765\u91ca\u653e\uff08ps\uff1a\u5f53\u6587\u4ef6\u88abfclose()\u6389\u540e\uff0c\u9501\u4e5f\u4f1a\u88ab\u91ca\u653e\uff09\n * LOCK_NB \u9644\u52a0\u9501\uff0c\u4e0d\u8fc7\u4e0d\u5e0c\u671bflock()\u5728\u9501\u5b9a\u65f6\u5835\u585e\uff0c\u5c31\u5e94\u8be5\u5728\u4e0a\u9762\u9501\u5b9a\u540e\uff0c\u518d\u52a0\u4e0a\u8be5\u9501\n * \u9501\u5b9a\u963b\u585e\u662f\u6307\u5df2\u7ecf\u88abflock()\u9501\u5b9a\u7684\u6587\u4ef6\uff0c\u518d\u6b21\u88abflock()\u65f6\uff0cflock()\u51fd\u6570\u5c31\u4f1a\u6302\u8d77\uff0c\u89e3\u51b3\u65b9\u6cd5\u9664\u4e86\n * \u4e0a\u9762\u52a0\u4e0a\u9644\u52a0\u9501\uff0c\u8fd8\u53ef\u4ee5\u6307\u5b9a\u7b2c\u4e09\u4e2a\u53c2\u6570wouldblock\u4e3a1\uff0c\u610f\u601d\u662f\u5f53\u6587\u4ef6\u9501\u5b9a\u65f6\u4f1a\u963b\u6321\u5176\u4ed6\u8fdb\u7a0b\u3002\n *\/\n \n echo "<h1>\u7f51\u7edc\u7559\u8a00\u677f<\/h1>";\n $fileName = "guestbook.txt";\n \/\/\u8c03\u7528\u81ea\u5b9a\u4e49\u51fd\u6570\uff0c\u8bfb\u53d6\u7559\u8a00\u677f\u4e2d\u7684\u6d88\u606f\n if(file_exists($fileName))\n readMessage($fileName);\n \n \/\/\u5982\u679c\u7528\u6237\u63d0\u4ea4\u4e86\u7559\u8a00\uff0c\u5c31\u8c03\u7528\u81ea\u5b9a\u4e49\u51fd\u6570\uff0c\u5199\u5165\u5230\u7559\u8a00\u677f\u4e2d\n if(isset($_POST['submitBtn']))\n writeMessage($fileName, $_POST['username'] . $_POST['title'] . $_POST['content']);\n \n function readMessage($fileName)\n {\n $fileHandle = fopen($fileName, "r");\n flock($fileHandle, LOCK_SH);\n $allMessages = "";\n \/\/\u5faa\u73af\u8bfb\u53d6\u6587\u4ef6\u4e2d\u7684\u7559\u8a00\n while(!feof($fileHandle))\n $allMessages .= fgets($fileHandle);\n $messageArray = explode("|", $allMessages);\n \n foreach ($messageArray as $message)\n {\n echo $message . "<br \/>";\n }\n flock($fileHandle, LOCK_UN);\n fclose($fileHandle);\n \n }\n \/\/\u5199\u5165\u7559\u8a00\u677f\n function writeMessage($fileName, $message)\n {\n $fileHandle = fopen($fileName, "a");\n flock($fileHandle, LOCK_EX);\n $message .= "|";\n fwrite($fileHandle, $message) or die("\u7559\u8a00\u5199\u5165\u5931\u8d25");\n flock($fileHandle, LOCK_UN);\n fclose($fileHandle); \n }\n \/**\n * \u5982\u679c\u8981\u9632\u6b62\u9501\u5b9a\u963b\u585e\uff0c\u53ef\u4ee5\u9644\u52a0LOCK_NB\u9501\n * flock($fileHandle, LOCK_EX+LOCK_NB);\n * flock($fileHandle, LOCK_UN+LOCK_NB);\n *\/\n?>\n <form action="file5.php" method="post">\n \u6635\u79f0\uff1a<input type="text" name="username" value="\u8bf7\u8f93\u5165\u6635\u79f0" onfocus="if(this.value=='\u8bf7\u8f93\u5165\u6635\u79f0') this.value=''" onblur="if(this.value=='') this.value='\u8bf7\u8f93\u5165\u6635\u79f0'"> <br \/>\n \u6807\u9898\uff1a<input type="text" name="title" value="\u8bf7\u8f93\u5165\u6807\u9898" onfocus="if(this.value=='\u8bf7\u8f93\u5165\u6807\u9898') this.value=''" onblur="if(this.value=='') this.value='\u8bf7\u8f93\u5165\u6807\u9898'"><br \/>\n \u7559\u8a00\uff1a<textarea name="content" rows=4 cols=40 onfocus="if(this.value=='\u8bf7\u8f93\u5165\u7559\u8a00') this.value=''" onblur="if(this.value=='') this.value='\u8bf7\u8f93\u5165\u7559\u8a00'">\u8bf7\u8f93\u5165\u7559\u8a00<\/textarea><br \/>\n <input type="submit" name="submitBtn" value="\u63d0\u4ea4">\n <\/form>\n <\/body>\n<\/html><\/pre>\n","protected":false},"excerpt":{"rendered":"\u5982\u679c\u8981\u5e76\u53d1\u8bfb\u53d6\u3001\u5199\u5165\u4e00\u4e2a\u6587\u4ef6\uff0c\u5c31\u8981\u5bf9\u6587\u4ef6\u52a0\u9501\uff0c\u9632\u6b62\u8bfb\u3001\u5199\u6df7\u4e71\uff0c\u9020\u6210\u7ed3\u679c\u6709\u8bef\uff0cphp\u4f7f\u7528\u51fd\u6570 bool flock(int handle, int operation, int &wouldlo...<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"pgc_sgb_lightbox_settings":"","footnotes":""},"categories":[33],"tags":[24,7],"class_list":["post-66","post","type-post","status-publish","format-standard","hentry","category-coding","tag-php","tag-7"],"views":3831,"_links":{"self":[{"href":"https:\/\/www.yeetrack.com\/index.php?rest_route=\/wp\/v2\/posts\/66","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.yeetrack.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.yeetrack.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.yeetrack.com\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.yeetrack.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=66"}],"version-history":[{"count":2,"href":"https:\/\/www.yeetrack.com\/index.php?rest_route=\/wp\/v2\/posts\/66\/revisions"}],"predecessor-version":[{"id":377,"href":"https:\/\/www.yeetrack.com\/index.php?rest_route=\/wp\/v2\/posts\/66\/revisions\/377"}],"wp:attachment":[{"href":"https:\/\/www.yeetrack.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=66"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.yeetrack.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=66"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.yeetrack.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=66"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}