I've done to downgrade from PHP5 to PHP4. And then it happened. The mail text has been garbled from the contact form. I can't read the mail I received. I googled something relative word about it. Although it took a long time, finally I got…

In PHP4, can't use Visibility(like private, public, etc). And variables are defined by var. Also can't use some of functions. So what I have to do is make the function instead of them.

This is a function to convert one-byte into two-byte or two-byte into one byte. option meaning r alphabet two-byte to one-byte R alphabet one-byte to two-byte n number two-byte to one-byte N number one-byte to two-byte a alphabet and numbe…

Today I saw === . I didn't know this equality operator before. It's a kind of equality operator.== : to compare values. === : to compare values and forms.1 == '1' is true, but 1 === '1' is false.Some other languages have same operator, Rub…