{"id":82,"date":"2020-11-10T11:42:26","date_gmt":"2020-11-10T03:42:26","guid":{"rendered":"http:\/\/9iwd.top\/?p=82"},"modified":"2020-11-10T11:42:26","modified_gmt":"2020-11-10T03:42:26","slug":"no-21-%e4%ba%86%e8%a7%a3%e5%9f%ba%e7%a1%80%e5%87%bd%e6%95%b0%e4%bd%bf%e7%94%a8","status":"publish","type":"post","link":"http:\/\/9iwd.top\/?p=82","title":{"rendered":"No.21 \u4e86\u89e3\u57fa\u7840\u51fd\u6570\u4f7f\u7528"},"content":{"rendered":"\n
<?php\n\t#\u6709\u5173\u8f93\u51fa\u7684\u51fd\u6570\nprint ('print\u8f93\u51fa\u5185\u5bb9<\/br>');\t\t\t\/\/print\u662f\u4e00\u4e2a\u7ed3\u6784\u4e0d\u662f\u51fd\u6570\uff0c\u53ef\u4ee5\u4e0d\u7528\u4f7f\u7528()\necho print 'echo+print\u8f93\u51fa\u5185\u5bb9<\/br>';\t\t\/\/\u8ddf echo \u7c7b\u4f3c\uff0c\u4f46\u662f\u6bcf\u6b21\u8f93\u51fa\u540e\u8fd4\u56de\u4e00\u4e2a\u6574\u65701\n\n$a='print_r\u8f93\u51fa\u5185\u5bb9<\/br><pre>';\nprint_r($a);\t\t\t\t\t\/\/print_r \u8ddf var_dump \u7c7b\u4f3c\u66f4\u591a\u662f\u662f\u8f93\u51fa\u53d8\u91cf\u6570\u7ec4\uff0c\u6253\u5370\u5185\u5bb9\u4e0d\u8f93\u51fa\u7c7b\u578b\n\n$a = array ('a' => 'apple', 'b' => 'banana', 'c' => array ('x', 'y', 'z'));\nprint_r ($a);\t\t\t\t\t\/\/\u5982\u679c\u6709true\uff0cprint_r ($a,true)\u90a3\u4e48 prine_r\u5c06\u8fd4\u56de\u4e0d\u8f93\u51fa\necho '<hr\/><\/pre>';\n\n<\/code><\/pre>\n\n\n\n
<?php\n\t#\u6709\u5173\u65f6\u95f4\u7684\u51fd\u6570\n\/\/date();\t\t\t\t\t\/\/\u6309\u7167\u6307\u5b9a\u683c\u5f0f\u5bf9\u5bf9\u5e94\u7684\u65f6\u95f4\u6233\uff08\u4ece1970\u5e74\u683c\u6797\u5a01\u6cbb\u65f6\u95f4\u5f00\u59cb\u8ba1\u7b97\u7684\u79d2\u6570\uff09\n$datetime = time();\t\t\t\t\/\/\u53d6\u5f53\u524d\u65f6\u95f4\u6233\necho date(\"Y-m-d H:i:s\",$datetime);\t\t\/\/\u53d6\u65f6\u95f4\u683c\u5f0f\uff0c\u5982\u679c\u7b2c\u4e8c\u53c2\u6570\u9ed8\u8ba4\u4e3a\u7a7a\uff0c\u53d6\u5f53\u524d\u65f6\u95f4\u6233\necho '<\/br>';\necho $datetime;\necho '<\/br>';\necho microtime(),'<\/br>';\t\t\t\/\/\u5c0f\u6570\u70b9\u540e\u97621-3\u6beb\u79d2\u6570\uff0c4-6\u5fae\u79d2\u6570\necho strtotime(\"2019-11-12 13:22:25\"),'<\/br>';\t\/\/\u53d6\u6307\u5b9a\u65f6\u95f4\u7684\u65f6\u95f4\u6233\necho '<hr\/>';\n\n<\/code><\/pre>\n\n\n\n
<?php\n\t#\u6709\u5173\u6570\u5b66\u51fd\u6570\necho max(1, 3, 5, 6, 7),'<\/br>';\t\t\/\/\u53d6\u51fa\u6307\u5b9a\u53c2\u6570\u7684\u6700\u5927\u503c\necho min(2, 3, 1, 6, 7),'<\/br>';\t\t\/\/\u53d6\u51fa\u6307\u5b9a\u53c2\u6570\u7684\u6700\u5c0f\u503c\necho rand(2,55),'<\/br>';\t\t\t\/\/\u53d6\u51fa\u6307\u5b9a\u533a\u57df\u5185\u7684\u4e00\u4e2a\u968f\u673a\u6570\necho mt_rand(2,55),'<\/br>';\t\t\t\/\/\u4e0e rand \u4e00\u6837\uff0c\u5e95\u5c42\u7ed3\u6784\u4e0d\u4e00\u6837\uff0c\u6548\u7387\u66f4\u9ad8(\u63a8\u8350\u4f7f\u7528)\necho round(4455.455,1),'<\/br>';\t\t\t\/\/\u56db\u820d\u4e94\u5165,\u53c2\u65702\u4e3a\u5c0f\u6570\u70b9\u4f4d\u6570\necho ceil(1-0.7),'<\/br>';\t\t\t\/\/\u5411\u4e0a\u53d6\u6574\necho floor(3+0.7),'<\/br>';\t\t\t\/\/\u5411\u4e0b\u53d6\u6574\necho pow(3,8),'<\/br>';\t\t\t\t\/\/\u6c42\u6b21\u65b9\uff0c3\u76848\u6b21\u65b9\necho abs(-0.038),'<\/br>';\t\t\t\/\/\u7edd\u5bf9\u503c\necho sqrt(33),'<\/br>';\t\t\t\t\/\/\u6c42\u5e73\u65b9\u6839\necho '<hr\/><pre>';\n\n<\/code><\/pre>\n\n\n\n
<?php\n\t#\u6709\u5173\u51fd\u6570\u7684\u51fd\u6570\n\/*\nfunction_exists();\t\t\t\/\/\u5224\u65ad\u6307\u5b9a\u7684\u51fd\u6570\u540d\u662f\u5426\u5728\u5185\u5b58\u5728\u5b58\u5728(\u5e2e\u52a9\u7528\u6237\u4e0d\u53bb\u4f7f\u7528\u4e00\u4e2a\u4e0d\u5b58\u5728\u7684\u51fd\u6570\uff0c\u8ba9\u4ee3\u7801\u5b89\u5168\u6027\u66f4\u9ad8)\nfunc_get_arg();\t\t\t\t\/\/\u5728\u81ea\u5b9a\u4e49\u51fd\u6570\u4e2d\u53bb\u83b7\u53d6\u6307\u5b9a\u6570\u503c\u5bf9\u5e94\u53c2\u6570\nfunc_get_args();\t\t\t\/\/\u5728\u81ea\u52a8\u4ee5\u51fd\u6570\u4e2d\u83b7\u53d6\u6240\u6709\u7684\u53c2\u6570(\u6570\u7ec4\u5f62\u52bf)\nfunc_num_args();\t\t\t\/\/\u83b7\u53d6\u5f53\u524d\u81ea\u5b9a\u4e49\u51fd\u6570\u7684\u53c2\u6570\u6570\u91cf\n*\/\n\n\/\/\u521b\u5efa\u81ea\u52a8\u4ee5\u51fd\u6570\nfunction test($a,$b){\n\t\/\/\u83b7\u53d6\u6307\u5b9a\u53c2\u6570\n\tvar_dump(func_get_arg(1));\t\t\/\/\u53d6\u53c2\u6570\u4e0b\u6807\u662f\u4ece0\u5f00\u59cb\n\t\n\t\/\/\u83b7\u53d6\u6240\u6709\u53c2\u6570\n\tvar_dump(func_get_args());\t\t\/\/\u53d6\u5f97\u6240\u6709\u53c2\u6570\u5185\u5bb9\u548c\u53c2\u6570\u603b\u6570\u91cf\n\t\n\t\/\/\u83b7\u53d6\u53c2\u6570\u6570\u91cf\n\tvar_dump(func_num_args());\t\t\/\/\u83b7\u53d6\u5f53\u524d\u51fd\u6570\u6570\u91cf\n}\n\n\/\/\u8c03\u7528\u51fd\u6570\nfunction_exists('test') && test(1,'2',3,4.15);\n\/\/\u5224\u65ad test \u6b63\u786e\u5b58\u5728\u4e14 test \u4f7f\u7528\u6b63\u786e\u624d\u6b63\u5e38\u6267\u884c\u4ee3\u7801\necho '<hr\/><\/pre>';\n\n<\/code><\/pre>\n\n\n\n
<\/p>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[],"_links":{"self":[{"href":"http:\/\/9iwd.top\/index.php?rest_route=\/wp\/v2\/posts\/82"}],"collection":[{"href":"http:\/\/9iwd.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/9iwd.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/9iwd.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/9iwd.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=82"}],"version-history":[{"count":0,"href":"http:\/\/9iwd.top\/index.php?rest_route=\/wp\/v2\/posts\/82\/revisions"}],"wp:attachment":[{"href":"http:\/\/9iwd.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=82"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/9iwd.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=82"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/9iwd.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=82"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}