Welcome to OStack Knowledge Sharing Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
558 views
in Technique[技术] by (71.8m points)

boolean logic - Whats wrong with my if else statement

I have a $name variable containing a string, and when I test it, I never get the "Name should be between 2 and 40 characters" error even when it's less than 2 characters long or more than 40. Why?

if (strlen($name) < 2 && strlen($name) > 40) {
    $nameError = 'Name should be between 2 and 40 characters';
}
See Question&Answers more detail:os

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Answer

0 votes
by (71.8m points)

How can the length be less than 2 and greater than 40? You want || ("or"), not && ("and").

if (strlen($name) < 2 || strlen($name) > 40) {
// -------------------^^

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome to OStack Knowledge Sharing Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

2.1m questions

2.1m answers

60 comments

57.0k users

...