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Differentiating between nulls & blanks in array 1

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CliveC

CliveC

Programmer
Nov 21, 2001
1,222
US
In testing the array values in TEST1.PHP, I want to differentiate between blank lines and nulls. Any ideas?
I have tried testing for " ", "\n", " \r\n" etc

Code: 
TEST1.HTM
<html><body>
<form name="mail" method="post" enctype="multipart/form-data"
 action="[URL unfurl="true"]http://chemtechs.com/kiss/test1.php">[/URL]
Message:<br /> 
<textarea name="t" rows="6" cols="36">
line-1
line-2

line-4
</textarea><br />
<input value="Send" type="submit" />
</form></body></html>

Code: 
TEST1.PHP
<?php
$text=$_POST['t'];
$line = explode("\n", $text);
for ($i=0; $i<9; $i++) {
 echo ($line[$i]);
 if ($line[$i]=="") {echo('null-line');}
 if ($line[$i]=="\r\n") {echo('blank-line');}
 echo ('<br />');
}
?>

Clive
 
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If you're exploding, then the newlines go away. Think about it and you'll see that any line "" had to have a \n before and after it (unless it was the first or last line) so was a blank line.
 
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You haven't really proven that it doesn't exist, you're only checking for a couple of possibilities and have no "else". Try doing something like:
Code: 
echo "|" . $line[$i] . "|\n";
to see if anything is there. If there is, you'll have figure out what non visible character is there, possibly by printing the ascii value if anything in it.

Showing the output would be helpful.
 
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Tried that and it appears to be a space but space does not work.

Code: 
|line-1 | 
|line-2 | 
| | 
|line-4 | 
|| null-line
|| null-line
|| null-line
|| null-line
|| null-line

Code: 
<?php
$text=$_POST['t'];
$line = explode("\n", $text);
for ($i=0; $i<9; $i++) {
 echo "|" . $line[$i] . "|\n";
// echo ($line[$i]);
 if ($line[$i]=="") {echo('null-line');}
 if ($line[$i]==" ") {echo('blank-line');}
 echo ('<br />');
}
?>


Clive
 
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