PHP trim function not functioning properly
Question
I have the following php/html page
<html>
<head>
<title>DZ Prototype</title>
<link rel="icon" type="img/ico" href="images/favicon.jpg">
<meta http-equiv="refresh" content="30">
</head>
<body>
<center>
<h1>Welcome to DZ Prototype Testing Area!!</h1>
</center>
<p></p>
<p></p>
<p></p>
<p style="text-align:center"><img src="https://diasp.eu/uploads/images/scaled_full_122e075ce77580c93020.jpeg" alt="It works!!"></p>
<p></p>
<p></p>
<div align="center">
<?php
$filename = "cowrie.txt";
$line = file($filename);
echo $line[15];
if(file_exists($filename)){
echo "<h2>Read through file and</h2>";
}
else{
echo "<h2>Upload not successful</h2>";
}
echo trim($line[15]);
if (trim($line[15]) == "Correctly Classified Instances 0 0 %") {
echo "<h2><font color='red'>Last entry is a Possible Malicious Login Attempt</h2>";
} else {
echo "<h2><font color='green'>Status Green</h2>";
}
?>
</div>
</body>
</html>
It appears that the if condition on the trim function is not being obeyed. I am debugging by printing the trim function on the line in text file on the page itself. Really don't know what I'm missing.
This is the text file
J48 pruned tree
------------------
AttemptsOnIP <= 6: 0 (9.0)
AttemptsOnIP > 6: 1 (20.0)
Number of Leaves : 2
Size of the tree : 3
=== Error on test data ===
Correctly Classified Instances 0 0 %
Incorrectly Classified Instances 1 100 %
Kappa statistic 0
Mean absolute error 1
Root mean squared error 1
Total Number of Instances 1
=== Detailed Accuracy By Class ===
TP Rate FP Rate Precision Recall F-Measure MCC ROC Area PRC Area Class
0.000 0.000 0.000 0.000 0.000 0.000 ? 1.000 0
0.000 1.000 0.000 0.000 0.000 0.000 ? ? 1
Weighted Avg. 0.000 0.000 0.000 0.000 0.000 0.000 0.000 1.000
=== Confusion Matrix ===
a b <-- classified as
0 1 | a = 0
0 0 | b = 1
Line 15 should be the exact line of the condition so I do not know what's the problem.
1 answers
solution1
2 ACCPTED 2016-05-06 00:11:41
trim is doing exactly what it's supposed to do. The documentation says:
trip whitespace (or other characters) from the beginning and end of a string.
The whitespace differences between your string and the line in the file are in the middle of the string, not the beginning or end.
You can use preg_replace() to compress sequences of whitespace to a single space.
if (preg_replace('/\s+/, ' ', $line[15]) == "Correctly Classified Instances 0 0 %") {
Or you could use a regular expression to match the line:
if(preg_match('/Correctly Classified Instances\s+0\s+0\s+%/', $line[15]) {
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