PHP中的连贯操作看起来的确很酷,也非常的方便代码的阅读,当然了必须是在OOP中用才行,在过程化的程序中,就没有必要用这种方法了。有实现这个方法的有用_CALL来实现的,而我下面写的这个例子,则不是用_call的,大家可以扩展一下吧。
下面写的这个sql语句组合类,主要是用于学习的,如果有同学想拿去用,请再完善一下。
"","where"=>"","order"=>"","limit"=>"");
原文链接:https://www.f2er.com/php/24210.htmlpublic function from($tableName) {
$this-><a href="https://www.jb51.cc/tag/sql/" target="_blank" class="keywords">sql</a>["from"]="FROM ".$tableName;
return $this;
}
public function where($_where='1=1') {
$this-><a href="https://www.jb51.cc/tag/sql/" target="_blank" class="keywords">sql</a>["where"]="WHERE ".$_where;
return $this;
}
public function order($_order='id DESC') {
$this-><a href="https://www.jb51.cc/tag/sql/" target="_blank" class="keywords">sql</a>["order"]="ORDER BY ".$_order;
return $this;
}
public function limit($_limit='30') {
$this-><a href="https://www.jb51.cc/tag/sql/" target="_blank" class="keywords">sql</a>["limit"]="LIMIT 0,".$_limit;
return $this;
}
public function select($_select='*') {
return "SELECT ".$_select." ".(implode(" ",$this-><a href="https://www.jb51.cc/tag/sql/" target="_blank" class="keywords">sql</a>));
}
}
echo $sql->from("testTable")->where("id=1")->order("id DESC")->limit(10)->select();
//输出 SELECT * FROM testTable WHERE id=1 ORDER BY id DESC LIMIT 0,10