06-16-2005
this is confusing..... what does it mean 'it displays the 3 first letters of all lines."?
could you show what you have so far together with sample input and the desired output, pls!
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LEARN ABOUT PHP
ctype_upper
CTYPE_UPPER(3) 1 CTYPE_UPPER(3)
ctype_upper - Check for uppercase character(s)
SYNOPSIS
bool ctype_upper (string $text)
DESCRIPTION
Checks if all of the characters in the provided string, $text, are uppercase characters.
PARAMETERS
o $text
- The tested string.
RETURN VALUES
Returns TRUE if every character in $text is an uppercase letter in the current locale.
EXAMPLES
Example #1
A ctype_upper(3) example (using the default locale)
<?php
$strings = array('AKLWC139', 'LMNSDO', 'akwSKWsm');
foreach ($strings as $testcase) {
if (ctype_upper($testcase)) {
echo "The string $testcase consists of all uppercase letters.
";
} else {
echo "The string $testcase does not consist of all uppercase letters.
";
}
}
?>
The above example will output:
The string AKLWC139 does not consist of all uppercase letters.
The string LMNSDO consists of all uppercase letters.
The string akwSKWsm does not consist of all uppercase 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_lower(3), setlocale(3).
PHP Documentation Group CTYPE_UPPER(3)