pg_delete

(PHP 4 >= 4.3.0, PHP 5)

pg_delete Deletes records

Descrierea

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.

Parametri

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.

Valorile întoarse

Întoarce valoarea TRUE în cazul succesului sau FALSE în cazul eșecului. Returns string if PGSQL_DML_STRING is passed via options.

Exemple

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";
  }
?>

Istoricul schimbărilor

Versiune Descriere
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.

A se vedea și

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

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User Contributed Notes 1 note

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1
Anonymous
10 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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