Bug #71634 [NEW]: String functions can't work with (purported) integer extracted from string

From: 4OtherBusiness at comcast dot net Operating system: Windows 7 Enterprise w/ SP 1 PHP version: 5.6.18 Package: *General Issues Bug Type: Bug Bug description:String functions can't work with (purported) integer extracted from string Description: ------------ Actually I'm using 5.6.14 * Source is text file, that I've done the notepad be-sure-it's-text exercise with. * Earlier I run my functions which scanned it and filled array $input with integers and text, all computed from the raw HTML. I've tried: * Modifying raw HTML that it scans * Renaming variables * intval() and settype($mystring,"integer") and mathematics Using settype() and later chunk_split() showed me that it's not substr(), as I originally thought, but the content of my variable. It looks like an integer, but it won't work w/ string functions. FORTUNATELY it does work with a for loop. Test script: --------------- // =========================================================================================== // For <select> function clearSelected(&$lines, $ele_no, $input, $opt_no_or_all) { if (strtolower($opt_no_or_all) != "all") { $opt_no=$opt_no_or_all ; $line_no=$input[$ele_no]['parts'][$opt_no]['selected']['line_no'] ; $line=$lines[$line_no] ; $NcharB4=$input[$ele_no]['parts'][$opt_no]['selected']['chars_before'] ; echo "Just extracted: \$NcharB4=".$NcharB4."\n" ; $chars_before=intval($NcharB4) ; echo "Integer val: \$chars_before=".$chars_before."\n" ; $chars_before=$chars_before * 1 -1+1; echo "After some math: \$chars_before=".$chars_before."\n" ; // The code below replaces bizarre $chars_before not working in string functions $front=""; for ($i=0;$i<$chars_before;$i++) {$front = $front.substr($line,$i,1) ;} echo "\$line=".htmlspecialchars($line) ; echo "\$chars_before=".$chars_before."\n" ; if (!is_null($chars_before) && !$chars_before=0) { $front=chunk_split($line,$chars_before) ; $back=mb_substr($line, $chars_before+8) ; echo "\$front=".htmlspecialchars($front)."\n" ; echo "\$back=".htmlspecialchars($back)."\n" ; $lines[$line_no]=$front.$back ; } } else { $nbr_opt=count($input[$ele_no]['parts']) ; for($opt_no=0;$nbr_opt-1; $opt_no++) { $line_no=$input[$ele_no]['parts'][$opt_no]['selected']['line_no'] ; $line=$lines[$line_no] ; $cbefore=$input[$ele_no]['parts'][$opt_no]['selected']['NcharB4'] ; if (!is_null($cbefore) && !$cbefore==0) { $front=substr($line, 0, $cbefore) ; $back=substr($line, $front+8+1) ; $lines[$line_no]=$front.$back ; } } } // EO else "all" or not return ; } Expected result: ---------------- WHAT I EXPECT TO GET: $line= <option value="1" selected>Option 1</option> $chars_before=50 $front= <option value="1" $back=>Option 1</option> Actual result: -------------- Just extracted: $NcharB4=49 Integer val: $chars_before=49 After some math: $chars_before=49 <option value="1" $line= <option value="1" selected>Option 1</option> $chars_before=49 Warning: chunk_split(): Chunk length should be greater than zero in C:\XAMPP\htdocs\Cell_Modems\PHP\parse_form.php on line 1139 $front= $back= <option value="1" selected>Option 1</option> -- Edit bug report at https://bugs.php.net/bug.php?id=71634&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=71634&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=71634&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=71634&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=71634&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=71634&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=71634&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=71634&r=needscript Try newer version: https://bugs.php.net/fix.php?id=71634&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=71634&r=support Expected behavior: https://bugs.php.net/fix.php?id=71634&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=71634&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=71634&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=71634&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=71634&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=71634&r=dst IIS Stability: https://bugs.php.net/fix.php?id=71634&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=71634&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=71634&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=71634&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=71634&r=mysqlcfg