ctype_cntrl
(PHP 4 >= 4.0.4, PHP 5)
ctype_cntrl -- Check for control character(s)
Descrição
bool
ctype_cntrl ( string text )
Checks if all of the characters in the provided string,
text, are control characters.
Control characters are e.g. line feed, tab, escape.
Valores de retornado
Returns TRUE if every character in text is
a letter from the current locale, FALSE otherwise.
Exemplos
Exemplo 1. A ctype_cntrl() example
<?php $strings = array('string1' => "\n\r\t", 'string2' => 'arf12'); foreach ($strings as $name => $testcase) { if (ctype_cntrl($testcase)) { echo "The string '$name' consists of all control characters.\n"; } else { echo "The string '$name' does not consist of all control characters.\n"; } } ?>
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O exemplo acima irá imprimir: The string 'string1' consists of all control characters.
The string 'string2' does not consists of all control characters. |
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