简单。 验证PHP

Question

. validation for php

Actualy i want to validate with . like when user enter abc.dfd then true otherwise false in abc only !!

Some other examples. All are true:

adfasf.fdasf
asf.fasdf
adfds.afds
adfs.afdsf

while these are false:

fsd
fsd
fsd

Answer 1

As the comment suggested, to check for a period or any particular string inside a string, just use strpos() and do a sstrict check (!==) check for false.

if(strpos($input, '.') !== false) {
    // There is a period
} else {
    // No Period
}