Question

我正在使用PHP和OCI8来执行匿名的Oracle PL / SQL代码块。有没有办法让我在块完成时绑定变量并获取其输出，就像我以类似的方式调用存储过程一样？

$SQL = "declare
something varchar2 := 'I want this returned';
begin
  --How can I return the value of 'something' into a bound PHP variable?
end;";

Answer 1

通过在名称和数据类型声明之间使用关键字OUT来定义out参数。 IE：

CREATE OR REPLACE PROCEDURE blah (OUT_PARAM_EXAMPLE OUT VARCHAR2) IS ...

如果未指定，则IN是默认值。如果要将参数同时用作in和out，请使用：

CREATE OR REPLACE PROCEDURE blah (INOUT_PARAM_EXAMPLE IN OUT VARCHAR2) IS ...

以下示例使用IN和OUT参数创建过程。然后执行该程序并打印出结果。

<?php
   // Connect to database...
   $c = oci_connect("hr", "hr_password", "localhost/XE");
   if (!$c) {
      echo "Unable to connect: " . var_dump( oci_error() );
      die();
   }

   // Create database procedure...
   $s = oci_parse($c, "create procedure proc1(p1 IN number, p2 OUT number) as " .
                     "begin" .
                     "  p2 := p1 + 10;" .
                     "end;");
   oci_execute($s, OCI_DEFAULT);

   // Call database procedure...
   $in_var = 10;
   $s = oci_parse($c, "begin proc1(:bind1, :bind2); end;");
   oci_bind_by_name($s, ":bind1", $in_var);
   oci_bind_by_name($s, ":bind2", $out_var, 32); // 32 is the return length
   oci_execute($s, OCI_DEFAULT);
   echo "Procedure returned value: " . $out_var;

   // Logoff from Oracle...
   oci_free_statement($s);
   oci_close($c);
 ?>

参考：

How does one call stored procedures from PHP?

Answer 2

这是我的决定：

function execute_procedure($procedure_name, array $params = array(), &$return_value = ''){
    $sql = "
    DECLARE
        ERROR_CODE      VARCHAR2(2000);
        ERROR_MSG       VARCHAR2(2000);
        RETURN_VALUE    VARCHAR2(2000);
    BEGIN ";

    $c = $this->get_connection();

    $prms = array();
    foreach($params AS $key => $value) $prms[] = ":$key";
    $prms = implode(", ", $prms);

    $sql .= ":RETURN_VALUE := ".$procedure_name."($prms);";
    $sql .= " END;";


    $s = oci_parse($c, $sql);

    foreach($params AS $key => $value)
    {
        $type = SQLT_CHR;
        if(is_array($value))
        {
            if(!isset($value['value'])) continue;
            if(!empty($value['type'])) $type = $value['type'];
            $value = $value['value'];
        }
        oci_bind_by_name($s, ":$key", $value, -1, $type);
    }

    oci_bind_by_name($s, ":RETURN_VALUE", $return_value, 2000);

    try{
        oci_execute($s);
        if(!empty($ERROR_MSG))
        {
            $data['success'] = FALSE;
            $this->errors = "Ошибка: $ERROR_CODE $ERROR_MSG";
        }
        return TRUE;
    }
    catch(ErrorException $e)
    {
        $this->errors = $e->getMessage();
        return FALSE;
    }
}

示例：

    execute_procedure('My_procedure', array('code' => 5454215), $return_value);
    echo $return_value;

我可以从匿名PL / SQL块向PHP返回值吗？

2 个答案: