11-18-2016
Looks like I've misread/misinterpreted your specification. Sorry for that.
So, in your picture, we're seeing many empty fields (e.g. 15 after the first), 81 fields make up a record of unpredictable length, and there's no <NL> (\n, ^J, 0x0A) char in it.
Are other non-printable, control characters possible, like <TAB>s? Or are all field contents printable alphanumeric characters?
Please note that it is far better to post or attach a sample input file, be it abbreviated, to work (and test) upon, than to show a picture.
This User Gave Thanks to RudiC For This Post:
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LEARN ABOUT PHP
ctype_print
CTYPE_PRINT(3) 1 CTYPE_PRINT(3)
ctype_print - Check for printable character(s)
SYNOPSIS
bool ctype_print (string $text)
DESCRIPTION
Checks if all of the characters in the provided string, $text, are printable.
PARAMETERS
o $text
- The tested string.
RETURN VALUES
Returns TRUE if every character in $text will actually create output (including blanks). Returns FALSE if $text contains control charac-
ters or characters that do not have any output or control function at all.
EXAMPLES
Example #1
A ctype_print(3) example
<?php
$strings = array('string1' => "asdf
", 'string2' => 'arf12', 'string3' => 'LKA#@%.54');
foreach ($strings as $name => $testcase) {
if (ctype_print($testcase)) {
echo "The string '$name' consists of all printable characters.
";
} else {
echo "The string '$name' does not consist of all printable characters.
";
}
}
?>
The above example will output:
The string 'string1' does not consist of all printable characters.
The string 'string2' consists of all printable characters.
The string 'string3' consists of all printable 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 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_cntrl(3), ctype_graph(3), ctype_punct(3).
PHP Documentation Group CTYPE_PRINT(3)