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Full Discussion: string checking
Top Forums Shell Programming and Scripting string checking Post 302210958 by gaurav123 on Wednesday 2nd of July 2008 10:02:10 AM
Old 07-02-2008
try this:

if [[ $str == [0-9][0-9]* ]];then

echo "\$str has numeric value=$str"
else
echo "$str is not numeric"
fi
 

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STRLEN(3)								 1								 STRLEN(3)

strlen - Get string length

SYNOPSIS
int strlen (string $string) DESCRIPTION
Returns the length of the given $string. PARAMETERS
o $string - The string being measured for length. RETURN VALUES
The length of the $string on success, and 0 if the $string is empty. CHANGELOG
+--------+---------------------------------------------------+ |Version | | | | | | | Description | | | | +--------+---------------------------------------------------+ | 5.3.0 | | | | | | | Prior versions treated arrays as the string | | | Array, thus returning a string length of 5 and | | | emitting an E_NOTICE level error. | | | | +--------+---------------------------------------------------+ EXAMPLES
Example #1 A strlen(3) example <?php $str = 'abcdef'; echo strlen($str); // 6 $str = ' ab cd '; echo strlen($str); // 7 ?> NOTES
Note strlen(3) returns the number of bytes rather than the number of characters in a string. Note strlen(3) returns NULL when executed on arrays, and an E_WARNING level error is emitted. SEE ALSO
count(3), grapheme_strlen(3), iconv_strlen(3), mb_strlen(3). PHP Documentation Group STRLEN(3)
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