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6_functions
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toupper
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2001-03-21
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Synopsis:
$tolower(text)
$toupper(text)
Technical:
This $toupper() function converts all occurrences of characters in the
range a..z to their uppercase counterparts, A..Z. Its counterpart,
$tolower(), does just the opposite, converting from A..Z to a..z.
Practical:
This basically converts the entire input string to all capital or all
lowercase letters, depending on the function used.
Returns:
input string with case converted
Examples:
$toupper(Hello there.) returns "HELLO THERE."
$tolower(Hi Bob!) returns "hi bob!"
See Also:
tr(6)
Restrictions:
These functions only work on 7-bit ascii letters. They will not convert
8-bit letters with the high bit set (i.e. European characters that have
accents, graves, etc.). Use $tr() instead.