pg_insert

说明

bool pg_insert ( resource connection, string table_name, array assoc_array [, int options] )

pg_insert() 将 assoc_array 数组中的值插入到由 table_name 指定的表中。table_name 中的列必须至少要有 assoc_array 中的单元那么多。table_name 中的字段名以及字段值必须和 assoc_array 中的键名及值匹配。如果成功则返回 TRUE，失败则返回 FALSE。如果给出了参数 options ，则函数 pg_convert() 会按照给定选项被作用到 assoc_array 上。

例子 1. pg_insert() 例子
<?php $db = pg_connect ('dbname=foo'); // This is safe, since $_POST is converted automatically $res = pg_insert($db, 'post_log', $_POST); if ($res) { echo "POST data is succesfully logged\n"; } else { echo "User must have sent wrong inputs\n"; } ?>

警告

本函数是实验性的。本函数的行为，包括函数名称以及其它任何关于本函数的文档可能会在没有通知的情况下随 PHP 以后的发布而改变。使用本函数风险自担。

参见 pg_convert()。

add a note User Contributed Notes

excalibur at nospam dot icehouse dot net
17-Oct-2006 11:06


Today at work I isolated a problem I was having with this function to how I was formatting the date.  I was assigning the date in my code as follows:



$today = date( "Ymd" ); // ISO 8601



This format is acceptable to PostgreSQL, as verified by their documentation and buy tests using psql.  However, to make it work in my code, I had to make the following change:



$today = date( "Y-m-d" ); // also ISO 8601 format

ANDYCHR17 at HOTMAIL dot COM
06-May-2006 05:50


Had a few issues while trying to run this in PHP 4.4.0:



- I could not get it to work with column names that are SQL reserved words (example: desc, order). I was forced to change the column names in order to use the function. I could not put the column names in quotes, because that caused pg_convert() to fail.



- Function was returning false until I passed the PGSQL_DML_EXEC option.

skippy at zuavra dot net
14-Feb-2005 11:08


Beware of the following: pg_insert() and pg_update() are adding slashes to all character-like fields they work with. This makes them SQL injection super-safe, but there are unwanted consequences, as follows:



If you have a regular setup with magic_quotes_gcp=On, and you use pg_insert() or pg_update(), you will end up with fields that look as if you used addslashes() twice. To solve this, you can use stripslashes() on the data just before using it with pg_insert() or pg_update().



There's another alternative, which seems better to me. Why make yourself crazy all over the code, adding slashes, stripping slashes, worrying whether magic_quotes_gpc is on or off and so on and so forth? Why do this, when the only place you actually need those slashes is right when you push the data into the database?



So why not get rid of your addslashes() and stripslashes() from all over your code, and turn magic_quotes_gcp off. As long as you always use pg_insert() and pg_update() to do your DB work, you're SQL-injection safe AND slash-headache free.

mina86 at tlen dot pl
24-May-2004 09:24


Next version :) My version checks whether value is bool, null, string or numeric and if one of the values is not function returns false if not. null values are inserted as NULL, bool as true or false and strings are add-shlashed before adding to query string. Note, that this function is not safe. SQL injection is possible with column names if you use $_POST or something similar as a $array.



<?php

function db_build_insert($table, $array) {

  if (count($array)===0) return false;

  $columns = array_keys($array);

  $values = array_values($array);

  unset($array);



  for ($i = 0, $c = count($values); $i$c; ++$i) {

    if (is_bool($values[$i])) {

      $values[$i] = $values[$i]?'true':'false';

    } elseif (is_null($values[$i])) {

      $values[$i] = 'NULL';

    } elseif (is_string($values[$i])) {

      $values[$i] = "'" . addslashes($values[$i]) . "'";

    } elseif (!is_numeric($values[$i])) {

      return false;

    }

  }



  return "INSERT INTO $table ($column_quote" . implode(', ', $columns) .

    ") VALUES (" . implode(', ', $values) . ")";

}

?>

shane at treesandthings dot com
22-Jan-2004 12:04


Returns SQL statement, slight improvement on the code from 'rorezende at hotmail dot com'.  This version adds bool values correctly.It also checks to make sure there is actually a value in the array before including it in the sql statement. (ie: null values or empty strings won't be added to the sql statement)



<?PHP

function db_build_insert($table,$array)

{



   $str = "insert into $table ";

   $strn = "(";

   $strv = " VALUES (";

   while(list($name,$value) = each($array)) {



       if(is_bool($value)) {

                $strn .= "$name,";

                $strv .= ($value ? "true":"false") . ",";

                continue;

        };



       if(is_string($value)) {

                $strn .= "$name,";

                $strv .= "'$value',";

                continue;

        }

       if (!is_null($value) and ($value != "")) {

                $strn .= "$name,";

                $strv .= "$value,";

                continue;

       }

   }

   $strn[strlen($strn)-1] = ')';

   $strv[strlen($strv)-1] = ')';

   $str .= $strn . $strv;

   return $str;



}

?>

rorezende at hotmail dot com
17-Jul-2003 02:49


Time is money, then I write a function similar to pg_insert in PHP (only output sql statement) :



   function db_mount_insert($table,$array) {



    $str = "insert into $table (";

    while(list($name,$value) = each($array)) {        

        $str .= "$name,";        

    }

    $str[strlen($str)-1] = ')';

    $str .= " values (";

    reset($array);

    while(list($name,$value) = each($array)) {        

        if(is_string($value))

            $str .= "'$value',";

        else

            $str .= "$value,";

    }

    $str[strlen($str)-1] = ')';

    $str .= ";"    ;

    

    return $str;



   }

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