{"id":1389,"date":"2024-04-14T09:28:18","date_gmt":"2024-04-14T01:28:18","guid":{"rendered":"https:\/\/log.tanxiaodian.com\/?p=1389"},"modified":"2024-04-14T09:28:20","modified_gmt":"2024-04-14T01:28:20","slug":"php%e5%8f%98%e9%87%8f%e5%ad%98%e5%82%a8%e5%9c%a8zval%e5%ae%b9%e5%99%a8%e4%b8%ad","status":"publish","type":"post","link":"https:\/\/log.tanxiaodian.com\/?p=1389","title":{"rendered":"PHP\u53d8\u91cf\u5b58\u50a8\u5728zval\u5bb9\u5668\u4e2d"},"content":{"rendered":"\n

PHP \u53d8\u91cf\u5b58\u50a8\u5728\u79f0\u4e3a\u201czval\u201d\u7684\u5bb9\u5668\u4e2d\u3002zval \u5bb9\u5668\u9664\u4e86\u53d8\u91cf\u7684\u7c7b\u578b\u548c\u503c\u4e4b\u5916\uff0c\u8fd8\u5305\u542b\u4e24\u4e2a\u989d\u5916\u7684\u4fe1\u606f\u4f4d\u3002\u7b2c\u4e00\u4e2a\u662f\u201cis_ref\u201d\uff0c\u662f\u5e03\u5c14\u503c\uff0c\u8868\u793a\u53d8\u91cf\u662f\u5426\u662f\u201c\u5f15\u7528\u96c6\u5408\u201d\u7684\u4e00\u90e8\u5206\u3002\u901a\u8fc7\u8fd9\u4e2a\u4f4d\uff0cPHP \u5f15\u64ce\u77e5\u9053\u5982\u4f55\u533a\u5206\u666e\u901a\u53d8\u91cf\u548c\u5f15\u7528\u3002\u7531\u4e8e PHP \u5141\u8bb8\u7528\u6237\u81ea\u5b9a\u4e49\u5f15\u7528\uff0c\u901a\u8fc7 & \u8fd0\u7b97\u7b26\u521b\u5efa\u5f15\u7528\uff0czval \u5bb9\u5668\u8fd8\u6709\u5185\u90e8\u5f15\u7528\u8ba1\u6570\u673a\u5236\u6765\u4f18\u5316\u5185\u5b58\u4f7f\u7528\u3002\u7b2c\u4e8c\u4e2a\u662f\u201crefcount\u201d\uff0c\u8868\u793a\u6709\u591a\u5c11\u4e2a\u53d8\u91cf\u540d\uff08\u4e5f\u79f0\u4e3a\u7b26\u53f7\uff09\u6307\u5411\u8fd9\u4e2a zval \u5bb9\u5668\u3002\u6240\u6709\u7b26\u53f7\u90fd\u5b58\u50a8\u5728\u4e00\u4e2a\u7b26\u53f7\u8868\u4e2d\uff0c\u6bcf\u4e2a\u4f5c\u7528\u57df\u90fd\u6709\u4e00\u4e2a\u7b26\u53f7\u8868\u3002\u4e3b\u811a\u672c\uff08\u5373\u901a\u8fc7\u6d4f\u89c8\u5668\u8bf7\u6c42\u7684\u811a\u672c\uff09\u6709\u4e00\u4e2a\u4f5c\u7528\u57df\uff0c\u6bcf\u4e2a\u51fd\u6570\u6216\u65b9\u6cd5\u4e5f\u6709\u4e00\u4e2a\u4f5c\u7528\u57df\u3002<\/p>\n\n\n\n

\u5f53\u4f7f\u7528\u5e38\u91cf\u503c\u521b\u5efa\u65b0\u53d8\u91cf\u65f6\uff0c\u4e5f\u4f1a\u521b\u5efa zval \u5bb9\u5668\uff0c\u4f8b\u5982<\/p>\n\n\n\n

\u793a\u4f8b #1 \u521b\u5efa\u65b0 zval \u5bb9\u5668<\/strong><?php
$a = \"new string\";
?><\/code><\/p>\n\n\n\n

\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u65b0\u7684\u7b26\u53f7\u540d\u79f0 a<\/code> \u4f1a\u5728\u5f53\u524d\u4f5c\u7528\u57df\u4e2d\u521b\u5efa\uff0c\u5e76\u4e14\u4f1a\u521b\u5efa\u65b0\u7684\u53d8\u91cf\u5bb9\u5668\uff0c\u5176\u7c7b\u578b\u4e3a string<\/a>\uff0c\u503c\u4e3a new string<\/code>\u3002\u7531\u4e8e\u6ca1\u6709\u521b\u5efa\u7528\u6237\u5b9a\u4e49\u7684\u5f15\u7528\uff0c\u201cis_ref\u201d\u4f4d\u9ed8\u8ba4\u8bbe\u7f6e\u4e3a false<\/a><\/code><\/strong>\u3002\u201crefcount\u201d\u8bbe\u7f6e\u4e3a 1<\/code>\uff0c\u56e0\u4e3a\u53ea\u6709\u4e00\u4e2a\u7b26\u53f7\u4f7f\u7528\u4e86\u8fd9\u4e2a\u53d8\u91cf\u5bb9\u5668\u3002\u8bf7\u6ce8\u610f\uff0c\u5177\u6709\u201crefcount\u201d\u4e3a 1<\/code> \u7684\u5f15\u7528\uff08\u5373”is_ref”\u4e3a true<\/a><\/code><\/strong>\uff09\u4f1a\u89c6\u4e3a\u975e\u5f15\u7528\uff08\u5373\u201cis_ref\u201d\u4e3a false<\/a><\/code><\/strong>\uff09\u3002\u5982\u679c\u5b89\u88c5\u4e86 \u00bb Xdebug<\/a>\uff0c\u53ef\u4ee5\u901a\u8fc7\u8c03\u7528 xdebug_debug_zval()<\/strong> \u6765\u663e\u793a\u6b64\u4fe1\u606f\u3002<\/p>\n\n\n\n

\u793a\u4f8b #2 \u663e\u793a zval \u4fe1\u606f<\/strong><?php
$a = \"new string\";
xdebug_debug_zval('a');
?><\/code><\/p>\n\n\n\n

\u4ee5\u4e0a\u793a\u4f8b\u4f1a\u8f93\u51fa\uff1a<\/p>\n\n\n\n

a: (refcount=1, is_ref=0)='new string'<\/pre>\n\n\n\n
\nhttps:\/\/www.php.net\/manual\/zh\/features.gc.refcounting-basics.php\n<\/div><\/figure>\n","protected":false},"excerpt":{"rendered":"
PHP \u53d8\u91cf\u5b58\u50a8\u5728\u79f0\u4e3a\u201czval\u201d\u7684\u5bb9\u5668\u4e2d\u3002zva…<\/p>\n
Continue readingPHP\u53d8\u91cf\u5b58\u50a8\u5728zval\u5bb9\u5668\u4e2d<\/span><\/a><\/div>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[3],"tags":[256],"_links":{"self":[{"href":"https:\/\/log.tanxiaodian.com\/index.php?rest_route=\/wp\/v2\/posts\/1389"}],"collection":[{"href":"https:\/\/log.tanxiaodian.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/log.tanxiaodian.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/log.tanxiaodian.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/log.tanxiaodian.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1389"}],"version-history":[{"count":1,"href":"https:\/\/log.tanxiaodian.com\/index.php?rest_route=\/wp\/v2\/posts\/1389\/revisions"}],"predecessor-version":[{"id":1390,"href":"https:\/\/log.tanxiaodian.com\/index.php?rest_route=\/wp\/v2\/posts\/1389\/revisions\/1390"}],"wp:attachment":[{"href":"https:\/\/log.tanxiaodian.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1389"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/log.tanxiaodian.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1389"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/log.tanxiaodian.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1389"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}