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<p>pg_field_is_null
<LINK TITLE="PostgreSQL Functions" HREF="ref.pgsql.html"><LINK TITLE="pg_fetch_row" HREF="function.pg-fetch-row.html"><LINK TITLE="pg_field_name" HREF="function.pg-field-name.html">
<p><a href="function.pg-fetch-row.html">Пред.</a>
<p><a href="function.pg-field-name.html">След.</a>
<p><h1><a name="function.pg-field-is-null"></a>pg_field_is_null</h1><div><a name="AEN127158"></a>
<p>(PHP 4 &#62;= 4.2.0, PHP 5)pg_field_is_null -- Test if a field is SQL NULL</div><div><a name="AEN127162"></a><h2>Описание</h2>int pg_field_is_null (resource result, int row, mixed field)
<p>int pg_field_is_null (resource result, mixed field)
<p>- pg_field_is_null() tests if a field in a PostgreSQL
<p>result resource is SQL NULL or not.
<p><DIV><BLOCKQUOTE>
<p>Замечание:
<p>This function used to be called pg_fieldisnull().
<p></BLOCKQUOTE></div></div><div><a name="AEN127191"></a><h2>Список параметров</h2>
<p>-
<p><DIV CLASS="variablelist"><DL><DT><VAR CLASS="parameter">result</DT><DD>
<p>- PostgreSQL query result resource, returned by <a href="function.pg-query.html">pg_query()</a>,
<p><a href="function.pg-query-params.html">pg_query_params()</a> or <a href="function.pg-execute.html">pg_execute()</a>
<p>(among others).
<p></DD><DT><VAR CLASS="parameter">row</DT><DD>
<p>- Row number in result to fetch. Rows are numbered from 0 upwards. If omitted,
<p>current row is fetched.
<p></DD><DT><VAR CLASS="parameter">field</DT><DD>
<p>- Field number (starting from 0) as an <a href="language.types.integer.html"><B CLASS="type">integer</a> or
<p>the field name as a <a href="language.types.string.html"><B CLASS="type">string</a>.
<p></DD></DL></div>
<p></div><div><a name="AEN127215"></a><h2>Возвращаемые значения</h2>
<p>- Returns 1 if the field in the given row is SQL NULL, 0
<p>if not. <TT CLASS="constant">FALSE is returned if the row is out of range, or upon any other error.
<p></div><div><a name="AEN127222"></a><h2>Примеры</h2>
<p>- <table><tr><td><DIV><a name="AEN127225"></a>
<p>Пример 1. pg_field_is_null() example<table><tr><td><code>
<p>&lt;?php
<p>$dbconn = pg_connect("dbname=publisher") or die ("Could not connect");
<p>$res = pg_query($dbconn, "select * from authors where author = 'Orwell'");
<p>if ($res) {
<p>if (pg_field_is_null($res, 0, "year") == 1) {
<p>echo "The value of the field year is null.\n";
<p>}
<p>if (pg_field_is_null($res, 0, "year") == 0) {
<p>echo "The value of the field year is not null.\n";
<p>}
<p>}
<p>?>
<p>
<p></code></TABLE></div></TABLE>
<p><a href="function.pg-fetch-row.html">Пред.</a>
<p><a href="index.html">Начало</a>
<p><a href="function.pg-field-name.html">След.</a>
<p>pg_fetch_row
<p><a href="ref.pgsql.html">Уровень выше</a>
<p>pg_field_name
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