In php, select echo or dump based on the variable type.

Source: Internet
Author: User
Sometimes, we want to output a variable. if it is an array, var_dump. if it is a string or something like that, we can echo it. the is_scalar built-in function will be used in this case.

Is_scalar -- checks whether the variable is a scalar.

Scalar variables refer to variables that contain integer, float, string, or boolean, while array, object, and resource are not scalar variables.

The code is as follows:


Function show_var ($ var ){
If (is_scalar ($ var )){
Echo $ var;
} Else {
Var_dump ($ var );
}
}
$ Pi = 3.1416;
$ Proteins = array ("hemoglobin", "cytochrome c oxidase", "ferredoxin ");

Show_var ($ pi );
// Print 3.1416

Show_var ($ proteins)
// Print:
// Array (3 ){
// [0] =>
// String (10) "hemoglobin"
// [1] =>
// String (20) "cytochrome c oxidase"
// [2] =>
// String (10) "ferredoxin"
//}
?>

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.