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

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<!-- splitted from ./en/functions/pgsql.xml, last change in rev 1.80 -->
<refentry xml:id='function.pg-select' xmlns="http://docbook.org/ns/docbook">
 <refnamediv>
  <refname>pg_select</refname>
  <refpurpose>
   Select records
  </refpurpose>
 </refnamediv>

 <refsect1 role="description">
  &reftitle.description;
  <methodsynopsis>
   <type>mixed</type><methodname>pg_select</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_select</function> selects records specified by
   <literal>assoc_array</literal> which has
   <literal>field=>value</literal>. For a successful query, it returns an
   array containing all records and fields that match the condition
   specified by <literal>assoc_array</literal>.
  </para>
  <para>If <literal>options</literal> is specified,
   <function>pg_convert</function> is applied to
   <literal>assoc_array</literal> with the specified flags.
  </para>
  &warn.experimental.func;
 </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 select 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 conditions that a row must meet to be retrieved.
      </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_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.
      </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_select</function> example</title>
    <programlisting role="php">
<![CDATA[
<?php 
  $db = pg_connect('dbname=foo');
  // This is safe, since $_POST is converted automatically
  $rec = pg_select($db, 'post_log', $_POST);
  if ($rec) {
      echo "Records selected\n";
      var_dump($rec);
  } else {
      echo "User must have sent wrong inputs\n";
  }
?>
]]>
    </programlisting>
   </example>
  </para>
 </refsect1>

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

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