First:
Make a firstdbm.db file.
Set attribute Read and Write.
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<html><body>
<?
$dbm = dbmopen("firstdbm","w");
echo "<b>$dbm: $dbm = dbmopen("firstdbm", "w");</b>< br>";
echo "<i>".dblist()." = dblist();</i>< br>< br>";
$fruit = "apple";
$colour = "red";
if (dbmexists ($dbm, $fruit)) {
$colour = dbmfetch ($dbm, $fruit);
echo "$colour: $colour = dbmfetch($dbm: $dbm, $fruit: $fruit);< br>";
$key = dbmreplace($dbm, $fruit, "green");
echo "$key: $key = dbmreplace($dbm: $dbm, $fruit: $fruit, "green");< br>";
$colour = dbmfetch ($dbm, $fruit);
echo "$colour: $colour = dbmfetch($dbm: $dbm, $fruit: $fruit);< br>";
if ( !dbmdelete($dbm, $fruit) ) {
echo "False (OK) = dbmdelete($dbm: $dbm, $fruit: $fruit);< br>";
} else {
echo "True (NOT OK) = dbmdelete($dbm: $dbm, $fruit: $fruit);< br>";
}
$colour = dbmfetch ($dbm, $fruit);
echo "$color: $colour = dbmfetch($dbm: $dbm, $fruit: $fruit);< br><hr>";
$i = 1;
$key = dbmfirstkey($dbm);
while ($key) {
if ($i==1) {
echo "$key: $key = dbmfirstkey($dbm: $dbm);< br>";
} else {
echo "$key: $key = dbmnextkey($dbm: $dbm);< br>";
}
$i++;
$colour = dbmfetch ($dbm, $key);
echo "$colour: $colour = dbmfetch($dbm: $dbm, $key: $key);< br>";
$key = dbmnextkey($dbm,$key);
}
} else {
dbminsert ($dbm, $fruit, $colour);
echo "dbminsert($dbm: $dbm, $fruit: $fruit, $colour: $colour);< br>";
dbminsert ($dbm, "pear", "yellow");
echo "dbminsert($dbm: $dbm, "pear", "yellow");< br>";
dbminsert ($dbm, "apricot", "pink");
echo "dbminsert($dbm: $dbm, "apricot", "pink");< br><hr>";
$i = 1;
$key = dbmfirstkey($dbm);
while ($key) {
if ($i==1) {
echo "$key: $key = dbmfirstkey($dbm: $dbm);< br>";
} else {
echo "$key: $key = dbmnextkey($dbm: $dbm);< br>";
}
$i++;
$colour = dbmfetch ($dbm, $key);
echo "$colour: $colour = dbmfetch($dbm: $dbm, $key: $key);< br>";
$key = dbmnextkey($dbm,$key);
}
}
echo "< br>";
if (dbmclose ($dbm)) {
echo "<b>True (OK) = dbmclose($dbm: $dbm);</b>< br>";
} else {
echo "<b>False (NOT OK) = dbmclose($dbm: $dbm);</b>< br>";
};
?>
</body></html>
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The first run output:
$dbm: 1 = dbmopen("firstdbm", "w");
ndbm support enabled = dblist();
dbminsert($dbm: 1, $fruit: apple, $colour: red);
dbminsert($dbm: 1, "pear", "yellow");
dbminsert($dbm: 1, "apricot", "pink");
$key: pear = dbmfirstkey($dbm: 1);
$colour: yellow = dbmfetch($dbm: 1, $key: pear);
$key: apricot = dbmnextkey($dbm: 1);
$colour: pink = dbmfetch($dbm: 1, $key: apricot);
$key: apple = dbmnextkey($dbm: 1);
$colour: red = dbmfetch($dbm: 1, $key: apple);
True (OK) = dbmclose($dbm: 1);
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The second run output:
$dbm: 1 = dbmopen("firstdbm", "w");
ndbm support enabled = dblist();
$colour: red = dbmfetch($dbm: 1, $fruit: apple);
$key: 0 = dbmreplace($dbm: 1, $fruit: apple, "green");
$colour: green = dbmfetch($dbm: 1, $fruit: apple);
False (OK) = dbmdelete($dbm: 1, $fruit: apple);
$color: = dbmfetch($dbm: 1, $fruit: apple);
$key: pear = dbmfirstkey($dbm: 1);
$colour: yellow = dbmfetch($dbm: 1, $key: pear);
$key: apricot = dbmnextkey($dbm: 1);
$colour: pink = dbmfetch($dbm: 1, $key: apricot);
True (OK) = dbmclose($dbm: 1);
