Code:
<?php
if (empty($userid)) {
echo "<HTML><HEADER></HEADER><BODY>";
echo "<form action='/abook.php' method='put'>User";
echo "<input type='text' name='userid' size='7'></form>";
}
if (!empty($userid)) {
header("Content-type: application/force-download");
header("Content-disposition: attachment; filename=$userid.cvs");
header("Expires: 0");
header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
header("Pragma: nocache");
print("\"Birthday\",\"Business City\",\"Business Country\",\"Business Fax\",\"Business Phone\",\"Business Phone 2\",\"Business Postal Code\",\"Business State\",\"Business Street\",\"Business Street 2\",\"Business Street 3\",\"Callback\",\"Car Phone\",\"Company\",\"Company Main Phone\",\"Department\",\"E-mail Address\",\"E-mail Display Name\",\"E-mail Type\",\"E-mail 2 Address\",\"E-mail 2 Display Name\",\"E-mail 2 Type\",\"E-mail 3 Address\",\"E-mail 3 Display Name\",\"E-mail 3 Type\",\"First Name\",\"Home City\",\"Home Country\",\"Home Fax\",\"Home Phone\",\"Home Phone 2\",\"Home Postal Code\",\"Home State\",\"Home Street\",\"Home Street 2\",\"Home Street 3\",\"Initials\",\"Job Title\",\"Last Name\",\"Middle Name\",\"Mobile Phone\",\"Notes\",\"Other City\",\"Other Country\",\"Other Fax\",\"Other Phone\",\"Other Postal Code\",\"Other State\",\"Other Street\",\"Other Street 2\",\"Other Street 3\",\"Pager\",\"Suffix\",\"Web Page\"
");
$readfile = file("/var/squirrelmail/prefs/".$userid.".abook");
for ($k=0; $k<=count($readfile)-1; $k++) {
$fields = split("\|",$readfile[$k]);
print("\"\",\"\",\"\",\"\",\"\",\"\",\"\",\"\",\"\",\"\",\"\",\"\",\"\",\"\",\"\",\"\",\"$fields[3]\",\"\",\"\",\"\",\"\",\"\",\"\",\"\",\"\",\"$fields[1]\",\"\",\"\",\"\",\"\",\"\",\"\",\"\",\"\",\"\",\"\",\"\",\"\",\"$fields[2]\",\"\",\"\",\"$fields[4]\",\"\",\"\",\"\",\"\",\"\",\"\",\"\",\"\",\"\",\"\",\"\",\"\"
");
}
}
?> i named it 'abook.php' and called it like 
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Importing squirrelmail abook files
