Dragon-Knight/src/actions/heal.php

<?php

// heal.php :: Handles stuff from the Quick Spells menu. (Healing spells only... other spells are handled in fight.php.)

function healspells($id)
{
    global $userrow;

    $userspells = explode(",", $userrow["spells"]);
    $spellrow = get_spell($id);

    // All the various ways to error out.
    $spell = false;
    foreach ($userspells as $b) if ($b == $id) $spell = true;
    if ($spell !== true) return display("You have not yet learned this spell. Please go back and try again.", "Error");
    if ($spellrow["type"] != 1) return display("This is not a healing spell. Please go back and try again.", "Error");
    if ($userrow["currentmp"] < $spellrow["mp"]) return display("You do not have enough Magic Points to cast this spell. Please go back and try again.", "Error");
    if ($userrow["currentaction"] == "Fighting") return display("You cannot use the Quick Spells list during a fight. Please go back and select the Healing Spell you wish to use from the Spells box on the main fighting screen to continue.", "Error");
    if ($userrow["currenthp"] == $userrow["maxhp"]) return display("Your Hit Points are already full. You don't need to use a Healing spell now.", "Error");

    $newhp = $userrow["currenthp"] + $spellrow["attribute"];
    if ($userrow["maxhp"] < $newhp) { $spellrow["attribute"] = $userrow["maxhp"] - $userrow["currenthp"]; $newhp = $userrow["currenthp"] + $spellrow["attribute"]; }
    $newmp = $userrow["currentmp"] - $spellrow["mp"];

	db()->query('UPDATE users SET currenthp=?, currentmp=? WHERE id=?;', [$newhp, $newmp, $userrow['id']]);

    return display("You have cast the ".$spellrow["name"]." spell, and gained ".$spellrow["attribute"]." Hit Points. You can now continue <a href=\"/\">exploring</a>.", "Healing Spell");
}