{"id":178,"date":"2026-03-21T13:32:22","date_gmt":"2026-03-21T05:32:22","guid":{"rendered":"https:\/\/arknight.wiki\/?p=178"},"modified":"2026-03-21T13:32:22","modified_gmt":"2026-03-21T05:32:22","slug":"php","status":"publish","type":"post","link":"https:\/\/arknight.wiki\/index.php\/2026\/03\/21\/php\/","title":{"rendered":"PHP"},"content":{"rendered":"<h1>PHP<\/h1>\n<h3>\u5e38\u7528\u51fd\u6570\uff1a<\/h3>\n<pre><code>preg_match()\uff1a\u7528\u4e8e\u6267\u884c\u6b63\u5219\u8868\u8fbe\u5f0f\u5339\u914d\npreg_match($pattern, $subject)\n\/\/$pattern\u662f\u6b63\u5219\u8868\u8fbe\u5f0f\uff0c$subject\u662f\u8981\u5339\u914d\u7684\u5b57\u7b26\u4e32\n\nparse_str()\uff1a\u76f4\u63a5\u5c06\u67e5\u8be2\u53c2\u6570\u89e3\u6790\u5230\u5f53\u524d\u4f5c\u7528\u57df\u53d8\u91cf\u4e2d\n$_GET['id']\u65f6\u6709\uff1a\nid=a[]=www.polarctf.com\n\nis_numeric\uff1abool is_numeric ( mixed $var )\n\/\/\u5982\u679c\u53d8\u91cf\u662f\u6570\u503c\u6216\u6570\u503c\u5b57\u7b26\u4e32\uff0c\u5219\u8fd4\u56de true\uff0c\u5426\u5219\u8fd4\u56de false\n\nstrrev\uff1aPHP \u4e2d\u7528\u4e8e\u53cd\u8f6c\u5b57\u7b26\u4e32\u7684\u51fd\u6570\nstrrev(\"Hello World!\")\n\nstrstr()\uff1a\u5728PHP\u4e2d\u7528\u4e8e\u67e5\u627e\u4e00\u4e2a\u5b57\u7b26\u4e32\u5728\u53e6\u4e00\u4e2a\u5b57\u7b26\u4e32\u4e2d\u9996\u6b21\u51fa\u73b0\u7684\u4f4d\u7f6e\uff0c\u5e76\u8fd4\u56de\u4ece\u8be5\u4f4d\u7f6e\u5f00\u59cb\u5230\u5b57\u7b26\u4e32\u672b\u5c3e\u7684\u5269\u4f59\u90e8\u5206\u3002\n\nstristr()\uff1astrstr()\u7684\u4e0d\u533a\u5206\u5927\u5c0f\u5199\uff08case-insensitive\uff09\u7248\u672c\u3002\n\nmb_strpos\uff1a\u7528\u4e8e\u5728\u591a\u5b57\u8282\u5b57\u7b26\u4e32\uff08\u5982 UTF-8 \u7f16\u7801\u7684\u5b57\u7b26\u4e32\uff09\u4e2d\u67e5\u627e\u5b50\u5b57\u7b26\u4e32\u9996\u6b21\u51fa\u73b0\u4f4d\u7f6e\u7684\u51fd\u6570\nmb_strpos(\n    string $haystack,\n    string $needle,\n    int $offset = 0,\n    ?string $encoding = null\n): int|false\n\/\/$haystack\uff1a\u8981\u641c\u7d22\u7684\u4e3b\u5b57\u7b26\u4e32\u3002\n\/\/$needle\uff1a\u8981\u67e5\u627e\u7684\u5b50\u5b57\u7b26\u4e32\u3002\n\/\/$offset\uff08\u53ef\u9009\uff09\uff1a\u5f00\u59cb\u641c\u7d22\u7684\u4f4d\u7f6e\uff08\u4ee5\u5b57\u7b26\u4e3a\u5355\u4f4d\uff0c\u4e0d\u662f\u5b57\u8282\uff09\u3002\n\/\/$encoding\uff08\u53ef\u9009\uff09\uff1a\u5b57\u7b26\u7f16\u7801\uff0c\u5982 'UTF-8'\u3002\u5982\u679c\u7701\u7565\uff0c\u4f7f\u7528\u5185\u90e8\u9ed8\u8ba4\u7f16\u7801\uff08\u53ef\u901a\u8fc7 mb_internal_encoding() \u83b7\u53d6\u6216\u8bbe\u7f6e\uff09\u3002\n\/\/\u8fd4\u56de\u503c\uff1a\u5982\u679c\u627e\u5230\uff0c\u8fd4\u56de\u5b50\u5b57\u7b26\u4e32\u5728\u4e3b\u5b57\u7b26\u4e32\u4e2d\u7684\u5b57\u7b26\u4f4d\u7f6e\uff08\u4ece 0 \u5f00\u59cb\uff09\uff0c\u5982\u679c\u672a\u627e\u5230\uff0c\u8fd4\u56de false\u3002\n\/\/\u4f8b\uff1a$pos = mb_strpos($string, \"\u4e16\u754c\", 0, $encoding);\n\nmb_substr\uff1aPHP \u4e2d\u7528\u4e8e\u5b89\u5168\u622a\u53d6\u591a\u5b57\u8282\u5b57\u7b26\u4e32\uff08\u5982 UTF-8 \u7f16\u7801\u7684\u4e2d\u6587\u3001\u65e5\u6587\u7b49\uff09\u7684\u51fd\u6570\nmb_substr(\n    string $string,\n    int $start,\n    ?int $length = null,\n    ?string $encoding = null\n): string\n\/\/$string\uff1a\u8981\u622a\u53d6\u7684\u539f\u59cb\u5b57\u7b26\u4e32\u3002\n\/\/$start\uff1a\u5f00\u59cb\u4f4d\u7f6e\uff08\u4ee5\u5b57\u7b26\u4e3a\u5355\u4f4d\uff0c\u4e0d\u662f\u5b57\u8282\uff09\u3002\n  \u6b63\u6570\uff1a\u4ece\u5b57\u7b26\u4e32\u5f00\u5934\u5f00\u59cb\u8ba1\u6570\uff080 \u8868\u793a\u7b2c\u4e00\u4e2a\u5b57\u7b26\uff09\u3002\n  \u8d1f\u6570\uff1a\u4ece\u5b57\u7b26\u4e32\u672b\u5c3e\u5f00\u59cb\u5012\u6570\uff08-1 \u8868\u793a\u6700\u540e\u4e00\u4e2a\u5b57\u7b26\uff09\u3002\n\/\/$length\uff08\u53ef\u9009\uff09\uff1a\u8981\u622a\u53d6\u7684\u5b57\u7b26\u6570\u3002\n  \u5982\u679c\u4e3a\u6b63\u6570\uff0c\u8868\u793a\u4ece $start \u5f00\u59cb\u53d6\u8fd9\u4e48\u591a\u5b57\u7b26\u3002\n  \u5982\u679c\u4e3a\u8d1f\u6570\uff0c\u8868\u793a\u4ece $start \u5f00\u59cb\uff0c\u5230\u8ddd\u79bb\u5b57\u7b26\u4e32\u672b\u5c3e $length \u4e2a\u5b57\u7b26\u5904\u505c\u6b62\u3002\n  \u5982\u679c\u7701\u7565\u6216\u4e3a null\uff0c\u5219\u4ece $start \u4e00\u76f4\u53d6\u5230\u5b57\u7b26\u4e32\u672b\u5c3e\u3002\n\/\/$encoding\uff08\u53ef\u9009\uff09\uff1a\u5b57\u7b26\u7f16\u7801\uff08\u5982 'UTF-8'\uff09\u3002\u82e5\u7701\u7565\uff0c\u4f7f\u7528 mb_internal_encoding() \u7684\u9ed8\u8ba4\u503c\u3002\n\u4f8b\uff1aecho mb_substr($str, 0, 2);\n\nputenv:PHP\u4e2d\u7684\u4e00\u4e2a\u51fd\u6570\uff0c\u7528\u4e8e\u8bbe\u7f6e\u73af\u5883\u53d8\u91cf\u3002\nbool putenv ( string $setting )\n\/\/\u4f8bputenv('PATH=\/home\/rceservice\/jail');\n\npahinfo()\uff1a\u5c06\u4f20\u5165\u7684\u8def\u5f84\u201c\u5b57\u5178\u5316\u201d\n\/\/var_dump(pathinfo(\u2018sandox\/cfbb870b58817bf7705c0bd826e8dba7\/123.txt\u2019));\n\/\/array(4) {\n    [\"dirname\"]=&gt;\n    string(39) \"sandox\/cfbb870b58817bf7705c0bd826e8dba7\"\n    [\"basename\"]=&gt;\n    string(7) \"123.txt\"\n    [\"extension\"]=&gt;\n    string(3) \"txt\"\n    [\"filename\"]=&gt;\n    string(3) \"123\"\n  }\n\nfile_put_contents()\uff1a\u5c06\u7ed3\u679c\u653e\u8fdb\u6587\u4ef6\u4e2d\n\u683c\u5f0f\uff1afile_put_contents(\n        string $filename,\n        mixed $data,\n        int $flags = 0,\n        resource $context = ?\n     ): int|false\n\/\/$filename\uff08string\uff09\uff1a\u8981\u5199\u5165\u7684\u6587\u4ef6\u8def\u5f84\u3002\u5982\u679c\u6587\u4ef6\u4e0d\u5b58\u5728\uff0cPHP \u4f1a\u5c1d\u8bd5\u521b\u5efa\u5b83\uff08\u9700\u6709\u76f8\u5e94\u76ee\u5f55\u7684\u5199\u6743\u9650\uff09\u3002\n\/\/$data\uff08mixed\uff09\uff1a\u8981\u5199\u5165\u7684\u6570\u636e\n\/\/$flags\uff08int\uff0c\u53ef\u9009\uff09\uff1a\u63a7\u5236\u5199\u5165\u884c\u4e3a\u7684\u4f4d\u63a9\u7801\u6807\u5fd7\uff0c\u5e38\u7528\u9009\u9879\u5305\u62ec\uff1a\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0FILE_USE_INCLUDE_PATH\uff1a\u5728 include_path \u4e2d\u641c\u7d22\u6587\u4ef6\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0FILE_APPEND\uff1a\u8ffd\u52a0\u5199\u5165\uff08\u800c\u4e0d\u662f\u8986\u76d6\uff09\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0LOCK_EX\uff1a\u5199\u5165\u65f6\u52a0\u6392\u4ed6\u9501\uff08\u9632\u6b62\u5e76\u53d1\u5199\u51b2\u7a81\uff09\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u591a\u4e2a\u6807\u5fd7\u53ef\u7528 | \u7ec4\u5408\n\/\/$context\uff08resource\uff0c\u53ef\u9009\uff09\uff1a\u6d41\u4e0a\u4e0b\u6587\uff08stream context\uff09\uff0c\u7528\u4e8e\u9ad8\u7ea7 I\/O \u64cd\u4f5c\uff08\u5982 HTTP\u3001FTP \u7b49\uff09\uff0c\u4e00\u822c\u672c\u5730\u6587\u4ef6\u64cd\u4f5c\u4e0d\u9700\u8981\u3002\n\/\/\u6210\u529f\u65f6\u8fd4\u56de\u5199\u5165\u7684\u5b57\u8282\u6570\uff08int\uff09\uff0c\u5931\u8d25\u65f6\u8fd4\u56de false\uff08\u4f8b\u5982\u6743\u9650\u4e0d\u8db3\u3001\u78c1\u76d8\u6ee1\u3001\u8def\u5f84\u65e0\u6548\u7b49\uff09\n\/\/\u4f8b\uff1afile_put_contents('example.txt', \"Hello, world!n\");\n\naddslashes\uff1aPHP\u4e2d\u7684\u4e00\u4e2a\u5b57\u7b26\u4e32\u5904\u7406\u51fd\u6570\uff0c\u7528\u4e8e\u5728\u5b57\u7b26\u4e32\u4e2d\u7684\u67d0\u4e9b\u7279\u5b9a\u5b57\u7b26\u524d\u6dfb\u52a0\u53cd\u659c\u6760\uff09\uff0c\u4ee5\u786e\u4fdd\u8fd9\u4e9b\u5b57\u7b26\u5728\u540e\u7eed\u7684\u5904\u7406\u8fc7\u7a0b\u4e2d\u4e0d\u4f1a\u5f15\u8d77\u8bed\u6cd5\u9519\u8bef\u6216\u5b89\u5168\u95ee\u9898\u3002\u8fd9\u4e9b\u7279\u5b9a\u5b57\u7b26\u5305\u62ec\u5355\u5f15\u53f7\uff08'\uff09\u3001\u53cc\u5f15\u53f7\uff08\"\uff09\u3001\u53cd\u659c\u6760\uff08\uff09\u548cNULL\u5b57\u8282\u3002\n\nextract()\uff1a\u7528\u4e8e\u4ece\u6570\u7ec4\u4e2d\u63d0\u53d6\u5143\u7d20\u5e76\u5c06\u5b83\u4eec\u5bfc\u5165\u5230\u5f53\u524d\u7684\u7b26\u53f7\u8868\u4e2d\uff0c\u5373\u5c06\u6570\u7ec4\u7684\u952e\u540d\u4f5c\u4e3a\u53d8\u91cf\u540d\uff0c\u952e\u503c\u4f5c\u4e3a\u53d8\u91cf\u503c\u3002\u5f88\u53ef\u80fd\u4f1a\u8986\u76d6\u53d8\u91cf\uff01\uff01\uff01\n\u683c\u5f0f\uff1aextract(array $array, int $flags = EXTR_OVERWRITE, ?string $prefix = null): int\n\u53c2\u6570\uff1a\narray $array\uff1a\u5fc5\u987b\u662f\u4e00\u4e2a\u5173\u8054\u6570\u7ec4\uff08\u952e\u4e3a\u5b57\u7b26\u4e32\uff09\uff0c\u51fd\u6570\u4f1a\u5c06\u6570\u7ec4\u7684\u6bcf\u4e2a\u952e\u4f5c\u4e3a\u53d8\u91cf\u540d\uff0c\u5bf9\u5e94\u7684\u503c\u4f5c\u4e3a\u53d8\u91cf\u503c\uff0c\u5728\u5f53\u524d\u4f5c\u7528\u57df\u4e2d\u521b\u5efa\u8fd9\u4e9b\u53d8\u91cf\u3002\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u5982\u679c\u952e\u662f\u6570\u5b57\uff08\u5982 0, 1\uff09\u6216\u975e\u6cd5\u53d8\u91cf\u540d\uff08\u5982\u4ee5\u6570\u5b57\u5f00\u5934\u3001\u5305\u542b\u7a7a\u683c\u7b49\uff09\uff0c\u9ed8\u8ba4\u4f1a\u88ab\u5ffd\u7565\uff08\u9664\u975e\u4f7f\u7528 EXTR_PREFIX_INVALID \u7b49\u6807\u5fd7\uff09\u3002\nint $flags = EXTR_OVERWRITE\uff1a\u63a7\u5236\u5f53\u8981\u521b\u5efa\u7684\u53d8\u91cf\u540d\u5df2\u5b58\u5728\u65f6\u7684\u884c\u4e3a\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0EXTR_OVERWRITE\uff08\u9ed8\u8ba4\uff09\uff1a\u8986\u76d6\u5df2\u5b58\u5728\u7684\u53d8\u91cf\u00a0\u00a0\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0EXTR_SKIP\uff1a\u8df3\u8fc7\u5df2\u5b58\u5728\u7684\u53d8\u91cf\uff0c\u4fdd\u7559\u539f\u503c\u00a0\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0EXTR_PREFIX_SAME\uff1a\u5982\u679c\u53d8\u91cf\u5df2\u5b58\u5728\uff0c\u5219\u7528 $prefix \u524d\u7f00\u65b0\u53d8\u91cf\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0EXTR_PREFIX_ALL\uff1a\u6240\u6709\u53d8\u91cf\u90fd\u52a0\u4e0a $prefix_ \u524d\u7f00\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0EXTR_PREFIX_INVALID\uff1a\u4ec5\u5bf9\u975e\u6cd5\u53d8\u91cf\u540d\uff08\u5982 123abc\uff09\u52a0\u524d\u7f00\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0EXTR_IF_EXISTS\uff1a\u4ec5\u5f53\u53d8\u91cf\u5df2\u5b58\u5728\u65f6\u624d\u5bfc\u5165\uff08\u7528\u4e8e\u66f4\u65b0\u5df2\u6709\u53d8\u91cf\uff09\n?string $prefix = null\uff1a\u6307\u5b9a\u4e00\u4e2a\u5b57\u7b26\u4e32\u524d\u7f00\uff0c\u65b0\u53d8\u91cf\u540d\u5c06\u53d8\u4e3a\uff1a$prefix . '_' . \u539f\u952e\u540d\uff0c\u524d\u7f00\u4e0d\u80fd\u4ee5\u6570\u5b57\u5f00\u5934\uff0c\u4e14\u5e94\u7b26\u5408\u53d8\u91cf\u547d\u540d\u89c4\u5219\uff08\u5b57\u6bcd\u6216\u4e0b\u5212\u7ebf\u5f00\u5934\uff09\u3002\n\u8fd4\u56de\u503c\uff1a\u8be5\u51fd\u6570\u8fd4\u56de\u6210\u529f\u63d0\u53d6\u7684\u53d8\u91cf\u6570\u76ee\u3002\n\/\/\u4f8b\uff1a$data = [\n          'name' =&gt; 'Alice',\n          'age'  =&gt; 30,\n          'city' =&gt; 'Paris'\n      ];\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0extract($data);\n      echo $name; \/\/ Alice\n      echo $age;  \/\/ 30\n      echo $city; \/\/ Paris\n\nassert()\uff1aPHP \u4e2d\u7528\u4e8e\u65ad\u8a00\u7684\u5185\u7f6e\u51fd\u6570\uff0cassert()\u51fd\u6570\u4f1a\u5c06\u8bfb\u5165\u7684\u4ee3\u7801\u5f53\u4f5cphp\u6267\u884c\n\nuniqid()\uff1a\u662f PHP \u4e2d\u7684\u4e00\u4e2a\u51fd\u6570\uff0c\u7528\u4e8e\u751f\u6210\u4e00\u4e2a\u552f\u4e00\u7684 ID\uff0c\u901a\u5e38\u7528\u4e8e\u521b\u5efa\u552f\u4e00\u7684\u6807\u8bc6\u7b26\n\ndate()\uff1a\u662f\u4e00\u4e2a\u975e\u5e38\u91cd\u8981\u7684\u65e5\u671f\u548c\u65f6\u95f4\u5904\u7406\u51fd\u6570\uff0c\u5b83\u80fd\u591f\u683c\u5f0f\u5316\u4e00\u4e2a\u65f6\u95f4\u6233\u4e3a\u66f4\u6613\u8bfb\u7684\u65e5\u671f\u548c\u65f6\u95f4\u5f62\u5f0f\n\u53c2\u6570\uff1ad\uff1a\u8868\u793a\u4e00\u4e2a\u6708\u4e2d\u7684\u7b2c\u51e0\u5929\uff0c\u4e24\u4f4d\u6570\u5b57\uff0c\u5982\u679c\u662f\u4e00\u5929\u5219\u524d\u9762\u8865\u96f6\uff0c\u5982 01 \u5230 31\u3002\n     m\uff1a\u8868\u793a\u4e00\u5e74\u4e2d\u7684\u7b2c\u51e0\u4e2a\u6708\uff0c\u4e24\u4f4d\u6570\u5b57\uff0c\u5982 01 \u5230 12\u3002\n     Y\uff1a\u56db\u4f4d\u6570\u5b57\u5b8c\u6574\u8868\u793a\u5e74\u4efd\uff0c\u5982 2023\u3002\n     H\uff1a\u8868\u793a\u5c0f\u65f6\uff0c24 \u5c0f\u65f6\u5236\uff0c\u4e24\u4f4d\u6570\u5b57\uff0c\u5982 00 \u5230 23\u3002\n     i\uff1a\u8868\u793a\u5206\uff0c\u4e24\u4f4d\u6570\u5b57\uff0c\u5982 00 \u5230 59\u3002\n     s\uff1a\u8868\u793a\u79d2\uff0c\u4e24\u4f4d\u6570\u5b57\uff0c\u5982 00 \u5230 59\u3002\n     a\uff1a\u8868\u793a AM \u6216 PM\uff08\u4e0a\u5348\u6216\u4e0b\u5348\uff09\u3002\n     l:\uff08\u5c0f\u5199\u7684 L\uff09\uff1a\u5b8c\u6574\u7684\u661f\u671f\u51e0\u7684\u6587\u672c\u540d\u79f0\uff0c\u5982 Monday\u3002\n     M\uff1a\u4e09\u4e2a\u5b57\u6bcd\u7f29\u5199\u7684\u6708\u4efd\u540d\u79f0\uff0c\u5982 Jan\u3002\n     g:\u7528\u4e8e\u83b7\u53d6\u5c0f\u65f6\u90e8\u5206\uff0c\u8303\u56f4\u662f\u4ece 1 \u5230 12\u3002\n\/\/\u5728data\u51fd\u6570\u5185\u4f7f\u7528\u4e0a\u8ff0\u5b57\u6bcd\u9700\u8981\u8f6c\u4e49\n\nstream_context_create\uff1a\u662fPHP\u4e2d\u7528\u4e8e\u521b\u5efa\u4e00\u4e2a\u6d41\uff08stream\uff09\u4e0a\u4e0b\u6587\u7684\u51fd\u6570\u3002\u6d41\u4e0a\u4e0b\u6587\u662f\u4e3a\u6587\u4ef6\u6d41\uff08\u6bd4\u5982\u7f51\u7edc\u8bf7\u6c42\uff09\u914d\u7f6e\u9009\u9879\u7684\u4e00\u4e2a\u96c6\u5408\uff0c\u5b83\u53ef\u4ee5\u8ba9\u5f00\u53d1\u8005\u5bf9\u6d41\u7684\u884c\u4e3a\u8fdb\u884c\u81ea\u5b9a\u4e49\uff0c\u6bd4\u5982\u8bbe\u7f6e\u8bf7\u6c42\u5934\u3001\u8d85\u65f6\u65f6\u95f4\u3001\u7528\u6237\u8ba4\u8bc1\u7b49\u3002\n\u683c\u5f0f\uff1a\nresource stream_context_create ( array $options [, array $params ] )\n\/\/\u53c2\u6570 options \u662f\u4e00\u4e2a\u5173\u8054\u6570\u7ec4\uff0c\u7528\u4e8e\u6307\u5b9a\u4e0d\u540c\u534f\u8bae\uff08\u5982 HTTP\u3001FTP \u7b49\uff09\u7684\u4e0a\u4e0b\u6587\u9009\u9879\uff0c\u9ed8\u8ba4\u503c\u4e3a NULL\u3002\u4f8b\u5982\uff0c\u5bf9\u4e8e HTTP \u8bf7\u6c42\uff0c\u53ef\u4ee5\u8bbe\u7f6e header \u9009\u9879\u6765\u6dfb\u52a0\u8bf7\u6c42\u5934\u4fe1\u606f\u3002\n\/\/\u53c2\u6570 params \u662f\u4e00\u4e2a\u5173\u8054\u6570\u7ec4\uff0c\u7528\u4e8e\u6307\u5b9a\u4e0a\u4e0b\u6587\u7684\u53c2\u6570\uff0c\u5982\u901a\u77e5\u56de\u8c03\u51fd\u6570\u7b49\uff0c\u9ed8\u8ba4\u503c\u4e3a NULL\u3002\n\/\/\u4f8b\uff1a\n$options = [\n    'http' =&gt; [\n        'method' =&gt; 'GET',\n        'header' =&gt; \"User-Agent: PHPrn\",\n        'timeout' =&gt; 30\n    ]\n];\n$context = stream_context_create($options);\n$content = file_get_contents('https:\/\/www.example.com', false, $context);\n\/\/\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0cstream_context_create \u521b\u5efa\u4e86\u4e00\u4e2a\u7528\u4e8e HTTP \u534f\u8bae\u7684\u4e0a\u4e0b\u6587\uff0c\u8bbe\u7f6e\u4e86\u8bf7\u6c42\u65b9\u6cd5\u4e3a GET\u3001\u6dfb\u52a0\u4e86\u7528\u6237\u4ee3\u7406\u5934\uff0c\u5e76\u8bbe\u7f6e\u4e86\u8d85\u65f6\u65f6\u95f4\u4e3a 30 \u79d2\u3002\u7136\u540e\u4f7f\u7528 file_get_contents \u51fd\u6570\u548c\u8fd9\u4e2a\u4e0a\u4e0b\u6587\u6765\u83b7\u53d6\u7f51\u9875\u7684\u5185\u5bb9\u3002\n\nstrcmp\uff1a\u662f\u4e00\u4e2a\u7528\u4e8e\u6bd4\u8f83\u4e24\u4e2a\u5b57\u7b26\u4e32\u7684\u51fd\u6570\u3002\n\u683c\u5f0f\uff1aint strcmp ( string $str1 , string $str2 )\n\u8fd4\u56de\u503c\uff1a\n  \u5982\u679c\u8fd4\u56de\u503c\u5c0f\u4e8e 0\uff0c\u8868\u793a $str1 \u5c0f\u4e8e $str2\u3002\n  \u5982\u679c\u8fd4\u56de\u503c\u7b49\u4e8e 0\uff0c\u8868\u793a $str1 \u548c $str2 \u76f8\u7b49\u3002\n  \u5982\u679c\u8fd4\u56de\u503c\u5927\u4e8e 0\uff0c\u8868\u793a $str1 \u5927\u4e8e $str2\n\ngetallheaders()\uff1a\u83b7\u53d6\u5f53\u524d\u8bf7\u6c42\u7684\u6240\u6709 HTTP \u6807\u5934\uff0c\u5e76\u8fd4\u56de\u4e00\u4e2a\u6570\u7ec4\n\npos()\uff1aPHP\u4e2d\u7684\u4e00\u4e2a\u5185\u7f6e\u51fd\u6570\uff0c\u7528\u4e8e\u8fd4\u56de\u6570\u7ec4\u4e2d\u5f53\u524d\u5143\u7d20\u7684\u503c\u3002\u5b83\u662f current() \u51fd\u6570\u7684\u522b\u540d\uff0c\u4e8c\u8005\u529f\u80fd\u5b8c\u5168\u76f8\u540c\uff0c\u8fd4\u56de\u6570\u7ec4\u4e2d\u5f53\u524d\u6307\u9488\u6240\u6307\u5411\u7684\u5143\u7d20\u7684\u503c\u3002\u5982\u679c\u6307\u9488\u8d85\u51fa\u4e86\u6570\u7ec4\u7684\u8303\u56f4\uff0c\u5219\u8fd4\u56de false\n\narray_reverse()\uff1a\u7528\u4e8e\u53cd\u8f6c\u6570\u7ec4\u7684\u987a\u5e8f\u3002\u5b83\u63a5\u6536\u4e00\u4e2a\u6570\u7ec4\u4f5c\u4e3a\u53c2\u6570\uff0c\u5e76\u8fd4\u56de\u4e00\u4e2a\u65b0\u7684\u6570\u7ec4\uff0c\u5176\u5143\u7d20\u987a\u5e8f\u4e0e\u539f\u6570\u7ec4\u76f8\u53cd\n\nexit()\uff1a\u7ec8\u6b62\u811a\u672c\u8fd0\u884c\n\ninstanceof\uff1aPHP \u4e2d\u7528\u4e8e\u68c0\u67e5\u5bf9\u8c61\u662f\u5426\u5c5e\u4e8e\u67d0\u4e2a\u7c7b\u7684\u64cd\u4f5c\u7b26\u3002\n\npassthru\uff1a\u6267\u884c\u7cfb\u7edf\u547d\u4ee4\n\ncall_user_func($func, $p)\uff1a\n\u6267\u884c$func\u51fd\u6570\uff0c\u4e14\u4ee5$p\u4e3a\u53c2\u6570\n\n$_GET as $re =&gt; $str\uff1a\n\u904d\u5386\u6bcf\u4e2aget\u53c2\u6570\uff0c\u5c06\u952e\u5f53\u4f5cre\uff0c\u503c\u5f53\u4f5cstr\n\neval:\u8bed\u8a00\u7ed3\u6784\uff0c\u6267\u884c\u91cc\u9762\u7684php\u8bed\u53e5\n$func = 'eval';\n$func('phpinfo();');  \/\/\u62a5\u9519\uff1aCall to undefined function eval()\uff0ceval\u4f5c\u4e3a\u8bed\u8a00\u7ed3\u6784\u65e0\u6cd5\u8c03\u7528<\/code><\/pre>\n<h3>\u4e00\u4e9b\u6bd4\u8f83\u7ed5\u8fc7\uff1a<\/h3>\n<pre><code>strcmp()\u51fd\u6570\u6bd4\u8f83\u4e24\u4e2a\u5b57\u7b26\u4e32\uff0c\u82e5\u53c2\u6570\u7c7b\u578b\u4e0d\u540c\u4f1a\u8fdb\u884c\u7c7b\u578b\u8f6c\u6362\uff0c\u51fd\u6570\u8fd4\u56deNULL\uff0c\u6bd4\u8f83\u65f6NULL\u4e0e\u7a7a\u5b57\u7b26\u4e32\u89c6\u4e3a\u76f8\u7b49\uff0c\u53ef\u901a\u8fc7\u6bd4\u8f83\u3002\n\u5982\uff1a\nstrcmp($a,$password)==0\n\u53ef\u4ee5\u6784\u9020\uff1a$a=1[]\u62162[]\n\nstrlen($args[0]) &lt; 4 &amp;&amp; ($args[0] + 1) &gt; 10000\u8fd9\u6837\u6bd4\u8f83\u5b57\u7b26\u4e32\u957f\u5ea6\u53c8\u8ba9\u5176\u503c\u5927\u4e8e\u67d0\u503c\u65f6\u53ef\u4ee5\u591f\u9020$args[0]=0e4,\u8fd9\u6837\u8fdb\u884c\u7b97\u6570\u8fd0\u7b97\u65f6\u4f1a\u81ea\u52a8\u4ee5\u79d1\u5b66\u8ba1\u6570\u6cd5\u8ba1\u7b97\n\u539f\u7406\uff1a\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0PHP \u5728\u8fdb\u884c \u6570\u5b66\u8fd0\u7b97\uff08\u5982 +\uff09\u65f6\uff0c\u4f1a\u81ea\u52a8\u5c06\u5b57\u7b26\u4e32\u8f6c\u6362\u4e3a\u6570\u5b57\uff0c\u4e14\u8f6c\u6362\u89c4\u5219\u5f88\u201c\u5bbd\u5bb9\u201d\uff1a\n\u5982\u679c\u5b57\u7b26\u4e32\u4ee5\u6570\u5b57\u5f00\u5934\uff0cPHP \u4f1a\u53d6\u5f00\u5934\u7684\u6570\u5b57\u90e8\u5206\uff0c\u5ffd\u7565\u540e\u9762\u975e\u6570\u5b57\u5185\u5bb9\u3002\n\nintval($num):\nintval\u5728\u89e3\u6790\u79d1\u5b66\u8ba1\u6570\u6cd5\u65f6\uff0c\u82e5\u4ec5\u670912e3\uff0c\u90a3\u4e48\u4f1a\u8fd4\u56dee\u524d\u9762\u7684\u6570\u5b57\uff0c\u8fd9\u91cc\u4e3a12\uff0c\u82e5\u662f\u79d1\u5b66\u8ba1\u6570\u6cd5\u52a0\u6570\u5b66\u8fd0\u7b97\uff0c\u90a3\u4e48\u5c31\u4f1a\u771f\u5b9e\u89e3\u6790\u4e3a\u6570\u5b57\uff0c\u598212e3+1\u89e3\u6790\u4e3a12001<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>PHP \u5e38\u7528\u51fd\u6570\uff1a preg_match()\uff1a\u7528\u4e8e\u6267\u884c\u6b63\u5219\u8868\u8fbe\u5f0f\u5339\u914d preg_match($pattern, [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[13,3],"tags":[],"class_list":["post-178","post","type-post","status-publish","format-standard","hentry","category-php","category-3"],"_links":{"self":[{"href":"https:\/\/arknight.wiki\/index.php\/wp-json\/wp\/v2\/posts\/178","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/arknight.wiki\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/arknight.wiki\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/arknight.wiki\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/arknight.wiki\/index.php\/wp-json\/wp\/v2\/comments?post=178"}],"version-history":[{"count":1,"href":"https:\/\/arknight.wiki\/index.php\/wp-json\/wp\/v2\/posts\/178\/revisions"}],"predecessor-version":[{"id":179,"href":"https:\/\/arknight.wiki\/index.php\/wp-json\/wp\/v2\/posts\/178\/revisions\/179"}],"wp:attachment":[{"href":"https:\/\/arknight.wiki\/index.php\/wp-json\/wp\/v2\/media?parent=178"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/arknight.wiki\/index.php\/wp-json\/wp\/v2\/categories?post=178"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/arknight.wiki\/index.php\/wp-json\/wp\/v2\/tags?post=178"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}