How to check whether a variable is numeric or not in php
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To check whether a variable or value is numeric or not, there is a simple method used in PHP and i.e. is_numeric function. This functions checks whether the condition is true or false.
Example:
<?php $check_number= '989'; if(is_numeric($check_number)){ echo "This is a numeric value."; } else{ echo "This is not a numeric value."; } ?>
Output: This is a numeric value.
<!-- That means, variable value is true -->
There is lot of examples. Like:
<?php $check_number= '122786.50'; if(is_numeric($check_number)){ echo "This is also a numeric value."; } else{ echo "This is not a numeric value."; } ?>
Output: This is also a numeric value.
If I change the value with alphabets, then it will return false.
Example:
<?php $check_number= 'AD122786.50'; if(is_numeric($check_number)){ echo "This is a numeric value."; } else{ echo "This is not a numeric value."; } ?>
Output: This is not a numeric value
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