Problem:- How to Check a Variable Contain a Valid Number?,
You want to ensure that a variable contains a number,
even if it’s typed as a string.
Alternatively, You want to check if a variable is not only a number,
but is also specifically typed as one.
Solution – Check a variable Contains a Valid Number or Not?
<?php
foreach([5, '10', 20, 'five', 30, '10e200', 0xDECAFBAD] as $check_no){
$isNumeric = is_numeric($check_no);
$variable_type = gettype($check_no);
print 'Is the '. $variable_type.' '.$check_no.' numeric?';
if($isNumeric){
print 'Yes';
}else{
print 'No';
}
print "\n";
}
?>
How it Works?
1st of all we put mixed number and string in a array. then we use foreach loop to convert in a single variable on by one in $check_no. After that we use is_numeric() function that return true or false when a single variable entered. then we use gettype() function to know the type of the $check_no variable. After that we use condition to print yes or not as based on condition.
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