我如何计算字符串中的char并使用PHP进行验证

Question

I want to validate a string in such a way that in must have 2 hypens(-)

Strings input : (for eg)

B405Q-0123-0600

B405Q-0123-0612

R450Y-6693-11H0

R450Y-6693-11H1

Answer 1

Make use of substr_count function like this

<?php
 echo substr_count( "B405Q-0123-0600", "-" )."
";
 echo substr_count( "B405Q01230600", "-" )."
";
?>

Will Result

2
0

Validate like this

if(substr_count( $some_string, "-" ) == 2)
{
       echo 'true';
       // do something here
}else
{
       echo 'false validation failed';
       // some error handling
}