I am creating the complete syntax of jquery and assigning it in the PHP field and on the button click I get the field value but the problem is in jquery the syntax I used to replace their value is not replaced. It shows the same variable.

<input type="hidden" name="ajaxUrl" id="ajaxUrl" value="'index.php?mode=ajax&action=modHistory&process=save&account={$account}&date=' + uenc(readNextdate('dateField')) + '&response=' + uenc(fieldVal('response')) + '&contact=' + uenc(fieldVal('contact')) + '&salesman=' + uenc(fieldVal('salesman')) + '&activity=' + uenc(fieldVal('activity')) + '&project=' + uenc(fieldVal('project')) + '&owner=' + uenc(fieldVal('owner')) + '&status=' + uenc(fieldVal('modstatus')) + '&product=' + uenc(fieldVal('product')) + '&duration=' + uenc(fieldVal('duration')) + '&username=' + uenc(fieldVal('username')) + '&oldProduct=' + uenc(fieldVal('oldProduct')) + '&oldDuration=' + uenc(fieldVal('oldDuration')) + '&oldActivity=' + uenc(fieldVal('oldActivity')) + '&oldDate={$pointer}{$save}&extraId={$extraId}&time=' + new Date().getTime() + '&token={$XSRFToken|escape:'url'}'">

At the jquery end I suppose it will replace the jquery syntax with there value but it shows the same value -

'index.php?mode=ajax&action=modHistory&process=save&account=10002&date=' + uenc(readNextdate('dateField')) + '&response=' + uenc(fieldVal('response')) + '&contact=' + uenc(fieldVal('contact')) + '&salesman=' + uenc(fieldVal('salesman')) + '&activity=' + uenc(fieldVal('activity')) + '&project=' + uenc(fieldVal('project')) + '&owner=' + uenc(fieldVal('owner')) + '&status=' + uenc(fieldVal('modstatus')) + '&product=' + uenc(fieldVal('product')) + '&duration=' + uenc(fieldVal('duration')) + '&username=' + uenc(fieldVal('username')) + '&oldProduct=' + uenc(fieldVal('oldProduct')) + '&oldDuration=' + uenc(fieldVal('oldDuration')) + '&oldActivity=' + uenc(fieldVal('oldActivity')) + '&oldDate=1638172792&FIELD1='+uenc(readNextdate('mod-RCMANL-ANAL01'))+'&ADDN-FIELD1=RCMANL-ANAL01&FIELD2='+uenc(jqfieldVal('.RCMANL-ANAL15 select'))+'&ADDN-FIELD2=RCMANL-ANAL15&FIELD3='+uenc(jqfieldVal('.RCMANL-ANAL13 input'))+'&ADDN-FIELD3=RCMANL-ANAL13&FIELD4='+uenc(readNextdate('mod-RCMANL-ANAL51'))+'&ADDN-FIELD4=RCMANL-ANAL51&FIELD5='+uenc(readNextdate('mod-RCMANL-ANAL80'))+'&ADDN-FIELD5=RCMANL-ANAL80&extraId=&time=' + new Date().getTime() + '&token=2d62814f617129a0a611dd505ec239a2'