php - need a regular expression in javascript which allows text having special character * in the begining of input data -

i new regex. need regex javascript code allows special character * in beginning of text input, not anywhere else in text.

example : should allow *text, should not allow *text*abcd

i need similar regex php well.

i have tried using "/^\s*/", doesn't work. anyways dont have anyidea of regex. have started learning it.

thanks dora

part of learning how use regex knowing when don't need it. in case solution without regex suffice, php:

if (strrpos($str, '*') > 0) {   // invalid position of * }

for javascript:

if (str.lastindexof('*') > 0) {     // invalid position * }

it finds last position of special character; if appears in string , not first character, code inside condition gets executed.

Funaction