pg_delete

(PHP 4 >= 4.3.0, PHP 5, PHP 7)

pg_delete — Deletes records

설명

mixed pg_delete ( resource $connection , string $table_name , array $assoc_array [, int $options = PGSQL_DML_EXEC ] )

pg_delete() deletes records from a table specified by the keys and values in assoc_array. If options is specified, pg_convert() is applied to assoc_array with the specified options.

인수

connection: PostgreSQL database connection resource.
table_name: Name of the table from which to delete rows.
assoc_array: An array whose keys are field names in the table table_name, and whose values are the values of those fields that are to be deleted.
options: Any number of PGSQL_CONV_FORCE_NULL, PGSQL_DML_NO_CONV, PGSQL_DML_ESCAPE, PGSQL_DML_EXEC, PGSQL_DML_ASYNC or PGSQL_DML_STRING combined. If PGSQL_DML_STRING is part of the options then query string is returned. When PGSQL_DML_NO_CONV or PGSQL_DML_ESCAPE is set, it does not call pg_convert() internally.

반환값

성공 시 TRUE를, 실패 시 FALSE를 반환합니다. Returns string if PGSQL_DML_STRING is passed via options.

예제

Example #1 pg_delete() example


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

변경점

버전	설명
5.6.0	No longer experimental. Added `PGSQL_DML_ESCAPE` constant, `TRUE`/`FALSE` and `NULL` data type support.
5.5.3/5.4.19	Direct SQL injection to `table_name` and Indirect SQL injection to identifiers are fixed.

참고

pg_convert() - Convert associative array values into suitable for SQL statement

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User Contributed Notes 1 note

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Anonymous ¶

20 years ago


One should take care when checking the return value. 
0 == false which is not equal with failed delete. 

if(!$res)
  echo "Nothing was deleted";

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