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PHP ctype_space

PHP original manual for ctype_space [ show | php.net ]

ctype_space

(PHP 4 >= 4.0.4, PHP 5, PHP 7)

ctype_spaceCheck for whitespace character(s)

Description

bool ctype_space ( string $text )

Checks if all of the characters in the provided string, text, creates whitespace.

Parameters

text

The tested string.

Return Values

Returns TRUE if every character in text creates some sort of white space, FALSE otherwise. Besides the blank character this also includes tab, vertical tab, line feed, carriage return and form feed characters.

Examples

Example #1 A ctype_space() example

<?php
$strings 
= array(
    
'string1' => "\n\r\t",
    
'string2' => "\narf12",
    
'string3' => '\n\r\t' // note the single quotes
);
foreach (
$strings as $name => $testcase) {
    if (
ctype_space($testcase)) {
        echo 
"The string '$name' consists of whitespace characters only.\n";
    } else {
        echo 
"The string '$name' contains non-whitespace characters.\n";
    }
}
?>

The above example will output:

The string 'string1' consists of whitespace characters only.
The string 'string2' contains non-whitespace characters.
The string 'string3' contains non-whitespace characters.

Notes

Note:

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

See Also

  • ctype_cntrl() - Check for control character(s)
  • ctype_graph() - Check for any printable character(s) except space
  • ctype_punct() - Check for any printable character which is not whitespace or an alphanumeric character