Length Checks

Check whether a string is long enough.
length-check Length validation records both the measured length and the decision that uses it.
                            password
                            password = "code" (default)password = "secret12"password = "x"
                        

                            length_check.php
                        
Replay: real traced execution (multi-file project)

                            <?php
$password = "code";
$length = strlen($password);
$status = $length >= 6 ? "strong" : "short";

echo "length=" . $length . "\n";
echo "status=" . $status . "\n";
<?php
$password = "secret12";
$length = strlen($password);
$status = $length >= 6 ? "strong" : "short";

echo "length=" . $length . "\n";
echo "status=" . $status . "\n";
<?php
$password = "x";
$length = strlen($password);
$status = $length >= 6 ? "strong" : "short";

echo "length=" . $length . "\n";
echo "status=" . $status . "\n";

                        
1$password ← code, $length ← 4, $status ← short1<?php2$password→ code = "code"; //@password="secret12", "x"3$length→ 4 = strlen($passwordcode);4$status→ short = $length4 >= 6 ? "strong" : "short";56echo "length=" . $length4 . "\n";7echo "status=" . $statusshort . "\n";⋯outputlength=4
status=short
1$password ← secret12, $length ← 8, $status ← strong1<?php2$password→ secret12 = "secret12";3$length→ 8 = strlen($passwordsecret12);4$status→ strong = $length8 >= 6 ? "strong" : "short";56echo "length=" . $length8 . "\n";7echo "status=" . $statusstrong . "\n";⋯outputlength=8
status=strong
1$password ← x, $length ← 1, $status ← short1<?php2$password→ x = "x";3$length→ 1 = strlen($passwordx);4$status→ short = $length1 >= 6 ? "strong" : "short";56echo "length=" . $length1 . "\n";7echo "status=" . $statusshort . "\n";⋯outputlength=1
status=short