php SQL之where语句生成器

<div class="codetitle"><a style="CURSOR: pointer" data="30868" class="copybut" id="copybut30868" onclick="doCopy('code30868')"> 代码如下:<div class="codebody" id="code30868">
//生成where字符串
function get_where($arg = null) {
foreach ((array)$arg as $key => $val) {
if(is_int($key)) {
$where .= " $val ";
}else {
if(is_string($val)) {
if($val === null) {
$where .= " and $key is null ";
}else {
$where .= " and $key = '$val' ";
}
}elseif(is_array($val)) {
foreach ($val as $v) {
if(is_string($v)) {
$in .= $in ? ",'$v'" : "'$v'";
}else {
$in .= $in ? ",$v" : "$v";
}
}
$where .= " and $key in ($in)";
}else {
$where .= " and $key = $val ";
}
}
}
return $where;
}

（编辑：李大同）

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