{"id":941,"date":"2007-12-20T01:52:40","date_gmt":"2007-12-19T13:52:40","guid":{"rendered":""},"modified":"2007-12-20T01:52:40","modified_gmt":"2007-12-19T13:52:40","slug":"","status":"publish","type":"post","link":"https:\/\/www.mudone.com\/?p=941","title":{"rendered":"\u5f15\u7528\u4f20\u9012"},"content":{"rendered":"<p>\u53ef\u4ee5\u5c06\u4e00\u4e2a\u53d8\u91cf\u901a\u8fc7\u5f15\u7528\u4f20\u9012\u7ed9\u51fd\u6570\uff0c\u8fd9\u6837\u8be5\u51fd\u6570\u5c31\u53ef\u4ee5\u4fee\u6539\u5176\u53c2\u6570\u7684\u503c\u3002\u8bed\u6cd5\u5982\u4e0b\uff1a <\/p>\n<p>\n<?php\nfunction foo(&#038;$var)\n{\n    $var++;\n}<\/p>\n<p>$a=5;<br \/>\nfoo($a);<br \/>\n\/\/ $a is 6 here<br \/>\n?>  <\/p>\n<p>\n\u6ce8\u610f\u5728\u51fd\u6570\u8c03\u7528\u65f6\u6ca1\u6709\u5f15\u7528\u7b26\u53f7\u2015\u2015\u53ea\u6709\u51fd\u6570\u5b9a\u4e49\u4e2d\u6709\u3002\u5149\u662f\u51fd\u6570\u5b9a\u4e49\u5c31\u8db3\u591f\u4f7f\u53c2\u6570\u901a\u8fc7\u5f15\u7528\u6765\u6b63\u786e\u4f20\u9012\u4e86\u3002\u5728\u6700\u8fd1\u7248\u672c\u7684 PHP \u4e2d\u5982\u679c\u628a &#038; \u7528\u5728 foo(&#038;$a); \u4e2d\u4f1a\u5f97\u5230\u4e00\u6761\u8b66\u544a\u8bf4\u201cCall-time pass-by-reference\u201d\u5df2\u7ecf\u8fc7\u65f6\u4e86\u3002 <\/p>\n<p>\u4ee5\u4e0b\u5185\u5bb9\u53ef\u4ee5\u901a\u8fc7\u5f15\u7528\u4f20\u9012\uff1a <\/p>\n<p>\n\u53d8\u91cf\uff0c\u4f8b\u5982 foo($a) <\/p>\n<p>New \u8bed\u53e5\uff0c\u4f8b\u5982 foo(new foobar()) <\/p>\n<p>\u4ece\u51fd\u6570\u4e2d\u8fd4\u56de\u7684\u5f15\u7528\uff0c\u4f8b\u5982\uff1a <\/p>\n<p>\n<?php\nfunction &#038;bar()\n{\n    $a = 5;\n    return $a;\n}\nfoo(bar());\n?>  <\/p>\n<p>\n\u8be6\u7ec6\u89e3\u91ca\u89c1\u5f15\u7528\u8fd4\u56de\u3002 <\/p>\n<p>\n\u4efb\u4f55\u5176\u5b83\u8868\u8fbe\u5f0f\u90fd\u4e0d\u80fd\u901a\u8fc7\u5f15\u7528\u4f20\u9012\uff0c\u7ed3\u679c\u672a\u5b9a\u4e49\u3002\u4f8b\u5982\u4e0b\u9762\u5f15\u7528\u4f20\u9012\u7684\u4f8b\u5b50\u662f\u65e0\u6548\u7684\uff1a <\/p>\n<p>\n<?php\nfunction bar() \/\/ Note the missing &#038;\n{\n    $a = 5;\n    return $a;\n}\nfoo(bar()); \/\/ \u81ea PHP 5.1.0 \u8d77\u5bfc\u81f4\u81f4\u547d\u9519\u8bef\nfoo($a = 5) \/\/ \u8868\u8fbe\u5f0f\uff0c\u4e0d\u662f\u53d8\u91cf\nfoo(5) \/\/ \u5bfc\u81f4\u81f4\u547d\u9519\u8bef\n?>  <\/p>\n<p>\n\u8fd9\u4e9b\u6761\u4ef6\u662f PHP 4.0.4 \u4ee5\u53ca\u4ee5\u540e\u7248\u672c\u6709\u7684\u3002 <\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u53ef\u4ee5\u5c06\u4e00\u4e2a\u53d8\u91cf\u901a\u8fc7\u5f15\u7528\u4f20\u9012\u7ed9\u51fd\u6570\uff0c\u8fd9\u6837\u8be5\u51fd\u6570\u5c31\u53ef\u4ee5\u4fee\u6539\u5176\u53c2\u6570\u7684\u503c\u3002\u8bed\u6cd5\u5982\u4e0b\uff1a \u6ce8\u610f\u5728\u51fd\u6570\u8c03\u7528\u65f6\u6ca1\u6709\u5f15\u7528\u7b26\u53f7\u2015\u2015 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_crdt_document":"","footnotes":""},"categories":[],"tags":[],"class_list":["post-941","post","type-post","status-publish","format-standard","hentry"],"_links":{"self":[{"href":"https:\/\/www.mudone.com\/index.php?rest_route=\/wp\/v2\/posts\/941","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.mudone.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.mudone.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.mudone.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.mudone.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=941"}],"version-history":[{"count":1,"href":"https:\/\/www.mudone.com\/index.php?rest_route=\/wp\/v2\/posts\/941\/revisions"}],"predecessor-version":[{"id":1245,"href":"https:\/\/www.mudone.com\/index.php?rest_route=\/wp\/v2\/posts\/941\/revisions\/1245"}],"wp:attachment":[{"href":"https:\/\/www.mudone.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=941"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.mudone.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=941"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.mudone.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=941"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}