Question

How to check if variable is null or empty in substr with PHP

Answer 1

$string = "php programming";

$result = substr($string ? $string : "***", 0,  3);

echo $result;




/*
run:

php

*/

 

70+ SQL courses for beginners and professionals

Answer 2

$string = "";

$result = substr($string ? $string : "***", 0,  3);

echo $result;




/*
run:

***

*/

 

70+ SQL courses for beginners and professionals

Answer 3

$string = null;

$result = substr($string ? $string : "***", 0,  3);

echo $result;




/*
run:

***

*/

 

70+ SQL courses for beginners and professionals