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--- en:extensions:workflowdesigner:custom-functions [2015/04/19 13:09]
swarnat
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-====== Custom functions ======
-<WRAP important round>
-==== Important ====
-**This Page describe a feature, which require PHP development skills.**
-If you use this feature in a wrong way, you could crash the Workflow!
-</WRAP>
-Lots of Workflow Tasks in the Designer could use custom functions.
-You recognize the option to use this functions, if you have an green border around a textfield and a special icon () next to the textbox.
-Almost all such fields have special hints about this function. (for example, what value you have to return)
-These scripts are default PHP Scripts with limited functions. All whitelisted PHP functions have the same arguments, like the original one.
-**Each custom function have to return a value with the "return"statement.**
-You could use the following PHP functions:
-  * md5, rand, implode, substr, explode, microtime, date, time, sha1, hash, intval, floatval, floor, ceil, foreach
-  * all functions, started with "str" (strpos, str_pad, str_replace, ...)
-==== Additional functions ====
-There are existing some special functions you could use to do vtiger related special tasks.
-Also you could create your own functions. [[en:extensions:workflowdesigner:developers|Read here]]
-Read the full documentation here: [[https://support.stefanwarnat.de/custom-functions/]]
-==== custom function Examples ====
-This example is only written to demonstrate the functions and could be done better.
-<code php>
-$var1 = "864"."0";
-$var1 = $var1.(0 + intval($vtiger_purchaseorder)).intval($vtiger_purchaseorder);
-$var2 = 1 + (2 * 5) - 8;
-$var1 = substr($var1, 0, 5);
-if($vtiger_purchaseorder == "1") {
-   $add = intval($var1) * $var2;
-   return time() + $add;
-} else {
-   $add = intval($var1) * intval($vtiger_purchaseorder);
-   return time() + $add;
-}
-</code>
-These function could be used inside the delay task to wait one day, or the amount of days in the Purchase Order Field of an invoice.
-**Here you could see one limitation of my implementation:**
-If you want use mathematical operations, you have to use parentheses to become the correct result, because the system ignore basic mathematical rules.
-==== Other examples ====
-Wait until same day next month
-<code php>
-return date("Y-m-d", strtotime("+1 month"));
-</code>
-Wait 5 days
-<code php>
-$days = 5;
-$date = strtotime($datefield);
-return date("Y-m-d", $date + (86400 * $days))
-</code>