\u67d0DBA\u5728\u67e5\u770b\u81ea\u5df1\u7684\u6570\u636e<\/span>\u5e93\u65e5\u5fd7\u7684\u65f6\u5019\uff0c\u770b\u5230\u4e86\u6570\u636e\u5e93\u670d\u52a1\u5668<\/span>\u4e0a\u51fa\u73b0\u4e86\u5f88\u591a\u5f88\u602a\u5f02\u7684SQL\u7684Where\u6761\u4ef6\u8bed\u53e5\uff0c\u662f\u4e0b\u9762\u8fd9\u4e2a\u6837\u5b50\uff1a\uff08\u6240\u6709\u7684where\u8bed\u53e5\u524d\u90fd\u6709\u4e86\u4e00\u4e2a\u53eb\u201c1=1\u201d\u7684\u5b50\u6761\u4ef6\uff09\u5475\u5475\u30023 U0 {* n: u) I- y# E1 G* z6 ~2 V<\/font><\/p>\n

\u4e0b\u8f7d<\/span><\/strong><\/a> (69.6 KB)<\/p>\n2009-12-7 15:06<\/div>\n<\/div>\n
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\u5982\u679c\u6ca1\u6709\u6761\u4ef6\u7684\u8bdd\uff0c\u5219\u4e0d\u9700\u8981where\n
\u5982\u679c\u53ea\u6709\u4e00\u4e2a\u6761\u4ef6\u7684\u8bdd\uff0c\u4e0d\u9700\u8981and.\n
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\n
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\u540c\u6837\uff0c\u5982\u679cand\u662f\u8981\u52a0\u5728\u6bcf\u4e2a\u6761\u4ef6\u524d\u9762\u7684\u8bdd\uff0c\u4f60\u5c31\u9700\u8981\u5224\u65ad\u662f\u5426\u662f\u7b2c\u4e00\u4e2a\uff0c\u5982\u679c\u662f\uff0c\u90a3\u5c31\u4e0d\u52a0\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n
\u771f\u662f***\u592a\u70e6\u4e86\uff0c\u6240\u4ee5\uff0c\u7f16\u7a0b\u201c\u5927\u62ff\u201d\u5f15\u5165\u4e86\u201c1=1\u201d\u6761\u4ef6\u8bed\u53e5\u3002\u4e8e\u662f\uff0c\u7f16\u7a0b\u7684\u96be\u5ea6\u5927\u5e45\u5ea6\u4e0b\u964d\uff0c\u4f60\u53ef\u4ee5\u7528\u5355\u4e00\u7684\u65b9\u5f0f\u6765\u5904\u7406\u8fd9\u82e5\u5e72\u7684\u67e5\u8be2\u5b50\u6761\u4ef6\u4e86\u3002\u800c1=1\u5e94\u8be5\u4f1a\u88ab\u6570\u636e\u5e93\u5f15\u64ce\u4f18\u5316\u65f6\u7ed9\u53bb\u6389\u4e86\u3002 <\/p>\n
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<pre><code>$query = “SELECT name FROM table WHERE 1=1 “;  \n
\n
\n
\n
foreach($clauses as $key => $value){  \n
\n
$query .= ” AND “.escape($key).”=”.escape($value).” “;  \n
\n
}  \n
\n
<\/code><\/pre> <\/li>\n<\/ol>\n<\/div>\n
\u590d\u5236\u4ee3\u7801<\/em><\/div>\n
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<pre><code>\/**\n
* @param string $base base of query, e.g. UPDATE table SET\n
* @param string $logic logic for concatenating $assoc, e.g. AND\n
* @param array $assoc associative array of `field`=>’value’ pairs to concatenate and append to $base\n
* @param string $suffix additional clauses, e.g. LIMIT 0,30\n
* @return string\n
*\/\n
function construct_sql($base, $logic, $clauses, $suffix=”)\n
{\n
\/\/ initialise array to avoid warnings\/notices on some PHP installations\n
$queries = array();\n
\n
\/\/ create array of strings to be glued together by logic\n
foreach($clauses as $key => $value)\n
      $queries[] = “`” . escape($key) . “`='” . escape($value) . “‘”;\n
\n
\/\/ add a space in case $base doesn’t have a space at the end and glue clauses together\n
$query .= ” ” . implode(” $logic “,$queries) . ” ” . $suffix . “;”;\n
\n
return $query;\n
}\n
\n
\/**\n
* @param string $str string to escape for intended use\n
* @return string\n
*\/\n
function escape($str)\n
{\n
return mysql_real_escape_string($str);\n
}\n
<\/code><\/pre><\/li>\n<\/ol>\n<\/div>\n
\u590d\u5236\u4ee3\u7801<\/em><\/div>\n
\u4e8e\u662f\uff0c\u6211\u4eec\u53ef\u4ee5\u8fd9\u6837\u4f7f\u7528\uff1a\uff08\u4e3a\u4ec0\u4e48\u6211\u4eec\u8981\u5728update\u8bed\u53e5\u540e\u52a0\u4e0a\u201cLimit 1\u201d\u5462\uff1f\u8fd9\u4e2a\u5173\u7cfb\u5230\u6027\u80fd\u95ee\u9898\uff0c\u5173\u4e8e\u8fd9\u65b9\u9762\u7684\u8bdd\u9898\uff0c\u4f60\u53ef\u4ee5\u67e5\u770b\u672c\u7ad9\u7684\u300aMySQL\u6027\u80fd\u4f18\u5316\u7684\u6700\u4f7320+\u6761\u7ecf\u9a8c<\/span><\/a>\u300b\uff09 <\/p>\n
\n
\n
\n
<pre><code>$updates = array(\n
‘field1’=>’val1’\n
‘field2’=>’val2’\n
);\n
$wheres = array(\n
‘field1’=>’cond1’,\n
‘field2’=>’cond2’\n
);\n
echo construct_sql(construct_sql(“UPDATE table SET”, “, “, $updates) . ” WHERE “, ” AND “, $wheres),”LIMIT 1”);\n
<\/code><\/pre>\n
<pre><\/pre><\/li>\n<\/ol>\n<\/div>\n
\u590d\u5236\u4ee3\u7801<\/em><\/div>\n
\u4e0b\u9762\u662f\u8f93\u51fa\u7ed3\u679c\uff1a <\/p>\n
\n
\n
\n
UPDATE table SET `field1`=’val1′, `field2`=’val2′ WHERE `field1`=’cond1′ AND `field2`=’cond2′ LIMIT 1;<\/li>\n<\/ol>\n<\/div>\n
\u590d\u5236\u4ee3\u7801<\/em><\/div>\n
\uff08\u5168\u6587\u5b8c\uff093 c! T9 ]& A’ s4 w<\/font><\/p>\n","protected":false},"excerpt":{"rendered":"
\u67d0DBA\u5728\u67e5\u770b\u81ea\u5df1\u7684\u6570\u636e\u5e93\u65e5\u5fd7\u7684\u65f6\u5019\uff0c\u770b\u5230\u4e86\u6570\u636e\u5e93\u670d\u52a1\u5668\u4e0a\u51fa\u73b0\u4e86\u5f88\u591a\u5f88\u602a\u5f02\u7684SQL\u7684Where\u6761\u4ef6\u8bed\u53e5\uff0c\u662f\u4e0b\u9762 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1,8],"tags":[],"class_list":["post-595","post","type-post","status-publish","format-standard","hentry","category-1","category-oldblog"],"views":332,"_links":{"self":[{"href":"http:\/\/www.ntxz.net\/index.php?rest_route=\/wp\/v2\/posts\/595","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.ntxz.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.ntxz.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.ntxz.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.ntxz.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=595"}],"version-history":[{"count":1,"href":"http:\/\/www.ntxz.net\/index.php?rest_route=\/wp\/v2\/posts\/595\/revisions"}],"predecessor-version":[{"id":796,"href":"http:\/\/www.ntxz.net\/index.php?rest_route=\/wp\/v2\/posts\/595\/revisions\/796"}],"wp:attachment":[{"href":"http:\/\/www.ntxz.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=595"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.ntxz.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=595"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.ntxz.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=595"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}