ctype_alnum(3) [php man page]

CTYPE_ALNUM(3)								 1							    CTYPE_ALNUM(3)

ctype_alnum - Check for alphanumeric character(s)

SYNOPSIS

       bool ctype_alnum (string  $text)

DESCRIPTION

	Checks if all of the characters in the provided string, $text, are alphanumeric.

PARAMETERS

	      o $text
		- The tested string.

RETURN VALUES

	Returns TRUE if every character in $text is either a letter or a digit, FALSE otherwise.

EXAMPLES

       Example #1

	      A ctype_alnum(3) example (using the default locale)

	      <?php
	      $strings = array('AbCd1zyZ9', 'foo!#$bar');
	      foreach ($strings as $testcase) {
		  if (ctype_alnum($testcase)) {
		      echo "The string $testcase consists of all letters or digits.
";
		  } else {
		      echo "The string $testcase does not consist of all letters or digits.
";
		  }
	      }
	      ?>

	      The above example will output:

	      The string AbCd1zyZ9 consists of all letters or digits.
	      The string foo!#$bar does not consist of all letters or digits.

NOTES

       Note

	       If an integer between -128 and 255 inclusive is provided, it is interpreted as the ASCII value of a single character (negative val-
	      ues have 256 added in order to allow characters in the Extended ASCII range). Any other integer is interpreted as a string  contain-
	      ing the decimal digits of the integer.

SEE ALSO

       ctype_alpha(3), ctype_digit(3), setlocale(3).

PHP Documentation Group 													    CTYPE_ALNUM(3)

CTYPE_LOWER(3)								 1							    CTYPE_LOWER(3)

ctype_lower - Check for lowercase character(s)

SYNOPSIS

       bool ctype_lower (string  $text)

DESCRIPTION

	Checks if all of the characters in the provided string, $text, are lowercase letters.

PARAMETERS

	      o $text
		- The tested string.

RETURN VALUES

	Returns TRUE if every character in $text is a lowercase letter in the current locale.

EXAMPLES

       Example #1

	      A ctype_lower(3) example (using the default locale)

	      <?php
	      $strings = array('aac123', 'qiutoas', 'QASsdks');
	      foreach ($strings as $testcase) {
		  if (ctype_lower($testcase)) {
		      echo "The string $testcase consists of all lowercase letters.
";
		  } else {
		      echo "The string $testcase does not consist of all lowercase letters.
";
		  }
	      }
	      ?>

	      The above example will output:

	      The string aac123 does not consist of all lowercase letters.
	      The string qiutoas consists of all lowercase letters.
	      The string QASsdks does not consist of all lowercase letters.

NOTES

       Note

	       If an integer between -128 and 255 inclusive is provided, it is interpreted as the ASCII value of a single character (negative val-
	      ues have 256 added in order to allow characters in the Extended ASCII range). Any other integer is interpreted as a string  contain-
	      ing the decimal digits of the integer.

SEE ALSO

       ctype_alpha(3), ctype_upper(3), setlocale(3).

PHP Documentation Group 													    CTYPE_LOWER(3)