(PHP 4 >= 4.1.0, PHP 5, PHP 7)
Examples:
COM example (1)
<?php
// starting word
$word = new COM("word.application") or die("Unable to instantiate Word");
echo "Loaded Word, version {$word->Version}\n";

//bring it to front
$word->Visible = 1;

//open an empty document
$word->Documents->Add();

//do some weird stuff
$word->Selection->TypeText("This is a test...");
$word->Documents[1]->SaveAs("Useless test.doc");

//closing word
$word->Quit();

//free the object
$word = null;
?>

COM example (2)
<?php

$conn = new COM("ADODB.Connection") or die("Cannot start ADO");
$conn->Open("Provider=SQLOLEDB; Data Source=localhost;
Initial Catalog=database; User ID=user; Password=password");

$rs = $conn->Execute("SELECT * FROM sometable");    // Recordset

$num_columns = $rs->Fields->Count();
echo $num_columns . "\n";

for ($i=0; $i < $num_columns; $i++) {
    $fld[$i] = $rs->Fields($i);
}

$rowcount = 0;
while (!$rs->EOF) {
    for ($i=0; $i < $num_columns; $i++) {
        echo $fld[$i]->value . "\t";
    }
    echo "\n";
    $rowcount++;            // increments rowcount
    $rs->MoveNext();
}

$rs->Close();
$conn->Close();

$rs = null;
$conn = null;

?>

variant_add

(PHP 5, PHP 7) "Adds" two variant values together and returns the result

2016-02-24 16:14:26
variant_imp

(PHP 5, PHP 7) Performs a bitwise implication on two variants

2016-02-24 16:14:27
variant_set_type

(PHP 5, PHP 7) Convert a variant into another type "in-place"

2016-02-24 16:14:29
com_create_guid

(PHP 5, PHP 7) Generate a globally unique identifier (GUID)

2016-02-24 16:14:24
variant_idiv

(PHP 5, PHP 7) Converts variants to integers and then returns the result from dividing them

2016-02-24 16:14:27
variant_sub

(PHP 5, PHP 7) Subtracts the value of the right variant from the left variant value

2016-02-24 16:14:29
variant_cat

(PHP 5, PHP 7) concatenates two variant values together and returns the result

2016-02-24 16:14:26
variant_neg

(PHP 5, PHP 7) Performs logical negation on a variant

2016-02-24 16:14:28
com_message_pump

(PHP 4 >= 4.2.0, PHP 5, PHP 7) Process COM messages, sleeping for up to timeoutms milliseconds

2016-02-24 16:14:25
variant_eqv

(PHP 5, PHP 7) Performs a bitwise equivalence on two variants

2016-02-24 16:14:27