\u4e00\uff1a
\n1,\u5728Linux\u4e0b\u4f7f\u7528\u6e90\u4ee3\u7801\u5305\u5b89\u88c5\u7684\u65b9\u5f0f\u662fPHP\u7684\u6700\u597d\u8fd0\u884c\u73af\u5883\uff0c
\n\u4e5f\u662f\u76ee\u524d\u7f51\u7ad9\u8fd0\u884c\u6700\u591a\u7684\u73af\u5883\uff0c\u53ef\u4ee5\u6839\u636e\u5b9e\u9645\u7684\u9700\u6c42\u6765\u8fdb\u884c\u5b89\u88c5
\n\u7f51\u7ad9\u7684\u8fd0\u884c\u73af\u5883\u3002
\n2,PHP\u4f7f\u7528\u96c6\u6210\u5f00\u53d1\u73af\u5883\u662f\u4e3a\u4e86\u5b89\u88c5\u65b9\u4fbf\u5feb\u6377\u4f7f\u7528\u7b80\u5355\u3002
\n3,PHP\u7684\u914d\u7f6e\u6587\u4ef6\u540d\u79f0\u745f\u5409\u662f\uff1aphp.ini\u3002
\n4,\u91cd\u65b0\u8bbe\u7f6ePHP\u7684\u6587\u4ef6\u6240\u5728\u7684\u6587\u6863\u8981\u76ee\u5f55\uff0c\u9700\u8981\u4fee\u6539Apache\u7684
\n\u914d\u7f6e\u6587\u4ef6httpd.conf\u3002
\n5,\u96c6\u6210\u5f00\u53d1\u73af\u5883\u6700\u9002\u5408\u5b66\u4e60\u4f7f\u7528\uff0c\u5546\u4e1a\u6700\u597d\u4e0d\u4f7f\u7528\u3002
\n6,\u4f7f\u7528\u7684\u96c6\u6210\u5f00\u53d1\u73af\u5883WAMPServer\u4e2d\u7684\u6bcf\u4e2a\u7248\u672c\uff1aApache2.4.4
\n,MySQL5.6.12,PHPMyAndmin4.0.4\u3002
\n7,httpd.conf\u662fApache\u7684\u914d\u7f6e\u6587\u4ef6\u3002
\n8,PHP\u7684\u5b66\u4e60\u8fd0\u884c\u73af\u5883\u4e2d\uff1aApache\uff0cMySQL\uff0cPHP\u662f\u5fc5\u987b\u5b89\u88c5\u7684\u3002
\n9,\u4fee\u6539PHP\u7684\u914d\u7f6e\u6587\u4ef6\u540e\u9700\u8981\u91cd\u65b0\u542f\u52a8Apache\u7684\u670d\u52a1\u3002
\n10,PHP\u8fd0\u884c\u7684\u96c6\u6210\u8f6f\u4ef6\u6709\uff1aWAMPServer\uff0cAppServer\uff0cPHPStudy\u3002
\n\u4e8c\uff1a
\n1,PHP\u7684\u8bed\u8a00\u5f00\u53d1\u65b9\u5411\uff1a\uff08Hypertext Preprocessor\uff09\u8d85\u6587\u672c\u5904\u7406\u5668
\n-\u670d\u52a1\u5668\u7aef\u811a\u672c\u8fd0\u884c
\n-\u547d\u4ee4\u884c\u811a\u672c\u8fd0\u884c
\n-\u5ba2\u6237\u7aef\u56fe\u5f62\u754c\u9762\uff08GUI\u7a0b\u5e8f\uff09
\n2,pPHP\u7684\u56db\u5bf9\u6807\u8bb0\uff1a
\n-<?php ?>
\n-<?script language=\u201dphp\u201d><\/script>
\n-<? ?>
\n-<% %>
\n\u6ce8\uff1a\u5047\u5982\u5168\u7bc7\u662fPHP\u4ee3\u7801\uff0c\u53ef\u4ee5\u4e0d\u5199\u7ed3\u675f\u6807\u7b7e\u76f4\u63a5\uff1a
\n<?php
\n\/\/php\u7c7b\u5bb9
\n3,\u66f4\u6539php\u7684\u914d\u7f6e\u6587\u4ef6\u91cc\u7684php.ini\u91cc\u7684short(\u77ed\u6807\u7b7e)
\n\u4e3aon\u53ef\u4ee5\u4f7f\u7528\u77ed\u6807\u7b7e\u3002\u66f4\u6539\u914d\u7f6e\u540e\u8981\u91cd\u542fApache\u7684\u670d\u52a1\u3002
\n4,\u529f\u80fd\u6267\u884c\u8bed\u53e5\u540e\u5fc5\u987b\u52a0\u5206\u53f7\uff0c\u5982\u679c\u662f\u7ed3\u675f\u5e76\u4e14\u662f\u5728\u201c?>\u201d
\n\u4e4b\u524d\u7684\u53ef\u4ee5\u4e0d\u52a0\uff0c
\n\u7ed3\u6784\u5b9a\u4e49\u8bed\u53e5\uff0c\u540e\u9762\u4e00\u5b9a\u4e0d\u8981\u52a0\u5206\u53f7\u3002
\n\u4e09\uff1a\u53d8\u91cf
\n(1)PHP\u53d8\u91cf\u58f0\u660e\u53ca\u53d8\u91cf\u7684\u547d\u540d
\n1,\u53d8\u91cf\u540d\u5b57\u4ee5$\u5f00\u59cb
\n2,\u53d8\u91cf\u7684\u540d\u79f0\u58f0\u660e\u65f6\u4e00\u5b9a\u8981\u6709\u610f\u4e49
\n3,\u4e0d\u5408\u6cd5\u7684\u53d8\u91cf\u540d\uff1a\u4e0d\u80fd\u4ee5\u6570\u5b57\u5f00\u5934,\u4e0d\u80fd\u6709\u8fd0\u7b97\u7b26\u53f7
\n\uff08\u5173\u952e\u5b57\u662f\u53ef\u4ee5\u4f5c\u4e3aPHP\u7684\u53d8\u91cf\u540d\u79f0\u4f7f\u7528\u7684\uff09
\n4,\u53d8\u91cf\u540d\u79f0\u533a\u5206\u5927\u5c0f\u5199\uff08\u9a7c\u5cf0\u662f\u547d\u540d\u65b9\u5f0f\uff09
\n5,\u53ef\u4ee5\u8fde\u7eed\u58f0\u660e\uff08\u5982$a=$b=$c=10\uff09,
\n(2)\u53d8\u91cf\u540d\u51fd\u6570\u68c0\u6d4b
\n$a = $b = $c = 10;
\n\/\/echo $b;
\n\/\/\u53d8\u91cf\u4e3a\u7a7a\u5b57\u7b26\u62160\u6216null\u8fd4\u56de\u503c\u662ftrue<\/p>\n
var_dump(empty($b));
\n\/\/\u5220\u9664\u53d8\u91cf
\nunset($b);
\n\/\/\u8f93\u51fa\u5176\u7c7b\u578b\u53ca\u503c
\nvar_dump(10);
\nvar_dump(\u201cabc\u201d);<\/p>\n
\/\/\u5224\u65ad\u53d8\u91cf\u540d\u662f\u5426\u5b58\u5728
\n$bool = isset($b);
\nvar_dump($bool);<\/p>\n
(3)\u53ef\u53d8\u91cf\u5c31\u662f\u53d8\u91cf\u540d\u6328\u7740\u52a0\u2019$\u2019;
\n$a=\u201dads\u201d;
\n$$a=\u201deee\u201d;
\necho $ads;\/\/\u8f93\u51fa\uff1aeee
\n(4)\u5f15\u7528\u53d8\u91cf
\n\u53d6\u5740\u7b26\u53f7\u2019&\u2019\uff08\u4e5f\u53ef\u4ee5\u79f0\u4e3a\u522b\u540d\uff09;
\n\u5982\uff1a
\n$a = 10;
\n$b = 20;
\n$c = &$a;\/\/\u4e5f\u53ef\u4ee5\u79f0\u4e3a$a\u7684\u522b\u540d
\n$c = 500;
\n$a = 100;
\necho $c;\/\/100
\n\u5176\u5b9e $a\u4e0e$c\u5c31\u662f\u4e00\u4f53
\n\u6ce8\uff1a echo\u53ef\u4ee5\u6253\u5370\u591a\u4e2a\u53c2\u6570\uff0cprint\u4e0d\u53ef\u4ee5
\n1,\u53ea\u6709\u53d8\u91cf\u624d\u6709\u5730\u5740\uff0c\u4e5f\u5c31\u662f\u53ea\u6709\u53d8\u91cf\u624d\u80fd\u5f15\u7528\uff1b
\n2,\u4e00\u4e2a\u53d8\u91cf\u53d1\u751f\u53d8\u5316\uff0c\u53e6\u4e00\u4e2a\u53d8\u91cf\u4e5f\u53d1\u751f\u53d8\u5316\uff1b
\n3,\u5728\u4f7f\u7528unset()\u51fd\u6570\u65f6\uff0c\u5982\u679c\u6709\u5f15\u7528\u5173\u7cfb\uff0c\u53ea\u662f
\n\u89e3\u9664\u4e86\u8fd9\u79cd\u5f15\u7528\u5173\u7cfb\uff0c\u53ea\u5220\u9664\u5220\u9664\u7684\u90a3\u4e00\u4e2a\u540d\u5b57
\n\u53d8\u91cf\uff0c\u53e6\u4e00\u4e2a\u8fd8\u5728\uff1b
\n4,\u5982\u679c\u4e24\u4e2a\u53d8\u91cf\u662f\u5f15\u7528\u5173\u7cfb\uff0c\u4e00\u4e2a\u53d8\uff0c\u53e6\u4e00\u4e2a\u4e5f\u53d8\uff0c
\n\u5982\u679c\u7ed9\u5176\u4e2d\u4e00\u4e2a\u5f15\u7528\u91cd\u65b0\u8d4b\u503c\u4e0d\u4f1a\u662f\u662f\u666e\u901a\u503c\uff0c\u800c\u662f
\n\u4e00\u4e2a\u65b0\u7684\u5f15\u7528\uff0c\u5219\u5173\u7cfb\u89e3\u9664\u3002
\n\u5982\uff1a
\n$a = 10;<\/p>\n
$b = &$a;<\/p>\n
$c = 100;<\/p>\n
$b = &$c;<\/p>\n
$b = 99;<\/p>\n
echo $a;\/\/10
\necho $b;\/\/99
\necho $c;\/\/99
\n\u56db\uff1a\u53d8\u91cf\u7c7b\u578b\u7684\u4ecb\u7ecd
\n\u516b\u79cd\u539f\u59cb\u7c7b\u578b\u2014\u2014var_dump();
\n1,\u56db\u79cd\u6807\u91cf\u7c7b\u578b\uff1a
\n-\u5e03\u5c14\u578b(boolean)
\necho\u00a0 \u76f4\u63a5\u8f93\u51fa\u65f6\uff08true\u662f1\uff0cfalse\u662f\u7a7a\uff09
\n-\u6574\u578b(integer)
\n-\u6d6e\u70b9\u578b(float)(\u6d6e\u70b9\u6570,\u4e5f\u4f5cdouble)
\n-\u5b57\u7b26\u4e32\uff08String\uff09
\n##\uff1a<<< \u5b9a\u754c\u7b26\uff08\u76f8\u5f53\u4e8e\u201c\u201d\uff0c\u52a0\u2018\u89e3\u9664\uff09\uff1b\u6216\u5355\u53cc\u5f15\u53f7
\n\u5217\uff1a
\n$var = true;
\necho $var;\/\/Boolean
\n$var = 10;
\necho $var;\/\/int
\n$var = 10.235;
\necho $var;\/\/float
\n$var = \u201cassaa\u201d;
\necho $var;\/\/String
\n2,\u4e24\u79cd\u590d\u5408\u7c7b\u578b\uff1a
\n-\u6570\u7ec4(Array)
\n-\u5bf9\u8c61(Object)
\n\u5217\uff1a
\n$var = array(\u201cone\u201d,\u201dtwo\u201d,\u201dthree\u201d)
\nvar_dump($var);\/\/arrey
\nclass Demo{
\nvar $one=10;
\nvar $one=20;
\nvar $one=30;
\n}
\n$var = new Demo;
\nvar_dump($var);\/\/object<\/p>\n
3,\u7279\u6b8a\u7c7b\u578b\uff1a
\n-\u8d44\u6e90(Rosoure)
\n-null
\n\u5217\uff1a
\n$var = mysql_connect(\u201clocalhost\u201d,\u201droot\u201d,\u201d\u201d)
\nvar_dump($var);\/\/object<\/p>\n
$var=null;
\nvar_dump($var);
\necho \u201c<br>\u201d<\/p>\n
#:\u4ee5\u4e0b\u90fd\u662fboolean\u7684flase\u503c
\n(1),boolean false
\n(2),int 0
\n(3),float 0.0\u00a0 0.00
\n(4),String \u201c\u201d \u201c0\u2033
\n(5),array \u7a7a\u6570\u7ec4
\n(6),\u7279\u6b8a\u7c7b\u578bnull
\n\u6240\u6709\u5176\u4ed6\u503c\u90fd\u662ftrue\u503c(\u4efb\u4f55\u8d44\u6e90)
\n4,\u4f2a\u7c7b\u578b\uff1a(\u5e76\u4e0d\u662fPHP\u7684\u7c7b\u578b)
\n-number(\u53ef\u4ee5\u662fint,folat)
\n-mixed(\u4efb\u4f55\u7c7b\u578b)
\n-callback(\u53ef\u4ee5\u662f\u4e00\u4e2a\u51fd\u6570);<\/p>\n","protected":false},"excerpt":{"rendered":"
\u4e00\uff1a 1,\u5728Linux\u4e0b\u4f7f\u7528\u6e90\u4ee3\u7801\u5305\u5b89\u88c5\u7684\u65b9\u5f0f\u662fPHP\u7684\u6700\u597d\u8fd0\u884c\u73af\u5883\uff0c \u4e5f\u662f\u76ee\u524d\u7f51\u7ad9\u8fd0\u884c\u6700\u591a\u7684\u73af\u5883\uff0c\u53ef\u4ee5\u6839\u636e\u5b9e […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[3],"tags":[10],"_links":{"self":[{"href":"http:\/\/www.jdde.cn\/index.php?rest_route=\/wp\/v2\/posts\/64"}],"collection":[{"href":"http:\/\/www.jdde.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.jdde.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.jdde.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.jdde.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=64"}],"version-history":[{"count":1,"href":"http:\/\/www.jdde.cn\/index.php?rest_route=\/wp\/v2\/posts\/64\/revisions"}],"predecessor-version":[{"id":65,"href":"http:\/\/www.jdde.cn\/index.php?rest_route=\/wp\/v2\/posts\/64\/revisions\/65"}],"wp:attachment":[{"href":"http:\/\/www.jdde.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=64"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.jdde.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=64"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.jdde.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=64"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}