check if a string is numeric Post: 302572675

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if test $b -ne then echo "\n\n\n\tPassword reset has been done successfully" else echo "\n\n\n\tAn error occurred" fi i want to check whether $b is non-numeric so how to do that?

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check the given string is numeric or not.

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How to check for a Numeric Value?

Using shell, I have a variable, how can I check that variable for a numeric value such as "41.0"? My program needs to do one things if the numeric value is found, and another if something else such as a string of letter is found. is there a specific character that denotes a numeral? The...

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Find the numeric value in a string and then check the max. value

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Check whether input is numeric

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LEARN ABOUT PHP

floatval

FLOATVAL(3)								 1							       FLOATVAL(3)

floatval - Get float value of a variable

SYNOPSIS

       float floatval (mixed  $var)

DESCRIPTION

	Gets the float value of $var.

PARAMETERS

	      o $var
		- May be any scalar type. floatval(3) should not be used on objects, as doing so will emit an E_NOTICE level error and return 1.

RETURN VALUES

	The float value of the given variable. Empty arrays return 0, non-empty arrays return 1.

	Strings will most likely return 0 although this depends on the leftmost characters of the string. The common rules of float casting apply.

EXAMPLES

       Example #1

	      floatval(3) Example

	      <?php
	      $var = '122.34343The';
	      $float_value_of_var = floatval($var);
	      echo $float_value_of_var; // 122.34343
	      ?>

       Example #2

	      floatval(3) non-numeric leftmost characters Example

	      <?php
	      $var = 'The122.34343';
	      $float_value_of_var = floatval($var);
	      echo $float_value_of_var; // 0
	      ?>

SEE ALSO

       boolval(3), intval(3), strval(3), settype(3), Type juggling.

PHP Documentation Group 													       FLOATVAL(3)