php-doc-en/reference/pgsql/functions/pg-delete.xml

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<refentry xml:id='function.pg-delete' xmlns="http://docbook.org/ns/docbook">
 <refnamediv>
  <refname>pg_delete</refname>
  <refpurpose>
   Deletes records
  </refpurpose>
 </refnamediv>

 <refsect1 role="description">
  &reftitle.description;
  <methodsynopsis>
   <type>mixed</type><methodname>pg_delete</methodname>
   <methodparam><type>resource</type><parameter>connection</parameter></methodparam>
   <methodparam><type>string</type><parameter>table_name</parameter></methodparam>
   <methodparam><type>array</type><parameter>assoc_array</parameter></methodparam>
   <methodparam choice="opt"><type>int</type><parameter>options</parameter><initializer>PGSQL_DML_EXEC</initializer></methodparam>
  </methodsynopsis>
  <para>
   <function>pg_delete</function> deletes records from a table specified by
   the keys and values in <parameter>assoc_array</parameter>. If <parameter>options</parameter> is
   specified, <function>pg_convert</function> is applied
   to <parameter>assoc_array</parameter> with the specified options.
  </para>
 </refsect1>

<refsect1 role="parameters">
  &reftitle.parameters;
  <para>
   <variablelist>
    <varlistentry>
     <term><parameter>connection</parameter></term>
     <listitem>
      <para>
       PostgreSQL database connection resource.
      </para>
     </listitem>
    </varlistentry>
    <varlistentry>
     <term><parameter>table_name</parameter></term>
     <listitem>
      <para>
       Name of the table from which to delete rows.
      </para>
     </listitem>
    </varlistentry>
    <varlistentry>
     <term><parameter>assoc_array</parameter></term>
     <listitem>
      <para>
       An <type>array</type> whose keys are field names in the table <parameter>table_name</parameter>,
       and whose values are the values of those fields that are to be deleted.
      </para>
     </listitem>
    </varlistentry>
    <varlistentry>
     <term><parameter>options</parameter></term>
     <listitem>
      <para>
       Any number of <constant>PGSQL_CONV_FORCE_NULL</constant>,
       <constant>PGSQL_DML_NO_CONV</constant>,
       <constant>PGSQL_DML_ESCAPE</constant>,
       <constant>PGSQL_DML_EXEC</constant>,
       <constant>PGSQL_DML_ASYNC</constant> or
       <constant>PGSQL_DML_STRING</constant> combined. If <constant>PGSQL_DML_STRING</constant> is part of the
       <parameter>options</parameter> then query string is returned. When <constant>PGSQL_DML_NO_CONV</constant>
       or <constant>PGSQL_DML_ESCAPE</constant> is set, it does not call <function>pg_convert</function> internally.
      </para>
     </listitem>
    </varlistentry>
   </variablelist>
  </para>
 </refsect1>

 <refsect1 role="returnvalues">
  &reftitle.returnvalues;
  <para>
   &return.success;  Returns <type>string</type> if <constant>PGSQL_DML_STRING</constant> is passed
   via <parameter>options</parameter>.
  </para>
 </refsect1>
 
 <refsect1 role="examples">
  &reftitle.examples;
  <para>
   <example>
    <title><function>pg_delete</function> example</title>
    <programlisting role="php">
<![CDATA[
<?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";
  }
?>
]]>
    </programlisting>
   </example>
  </para>
 </refsect1>

 <refsect1 role="changelog">
  &reftitle.changelog;
  <para>
   <informaltable>
    <tgroup cols="2">
     <thead>
      <row>
       <entry>&Version;</entry>
       <entry>&Description;</entry>
      </row>
     </thead>
     <tbody>
      <row>
       <entry>5.6.0</entry>
       <entry>
        No longer experimental. Added <constant>PGSQL_DML_ESCAPE</constant> constant,
        &true;/&false; and &null; data type support.
       </entry>
      </row>
      <row>
       <entry>5.5.3/5.4.19</entry>
       <entry>
        Direct SQL injection to <parameter>table_name</parameter> and Indirect SQL
        injection to identifiers are fixed.
       </entry>
      </row>
     </tbody>
    </tgroup>
   </informaltable>
  </para>
 </refsect1>

 <refsect1 role="seealso">
  &reftitle.seealso;
  <para>
   <simplelist>
    <member><function>pg_convert</function></member>
   </simplelist>
  </para>
 </refsect1>
</refentry>

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