Issue with the debugging in php -


i running aphpscript have while loop , file writings make take time.the problem comes when doesn 't seems print errors @ run time prints them after complete execution of script, , error in loop repeat every time loop , cost me lot of time. using wamp server version 2.2 .
here sample code

<!doctype html public "-//w3c//dtd xhtml 1.0 transitional//en" "http://www.w3.org/tr/xhtml1/dtd/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="algorithm" content="text/html; charset=utf-8" /> <title>delta compression</title> </head> <body>  <?php //db connection $dbuser = "root"; $dbpass = ""; $dbname = "delta_compression"; $dbhost = "localhost";  //database connection $con = mysql_connect($dbhost,$dbuser,$dbpass); if (!$con) { die('could not connect: ' . mysql_error()); }  mysql_select_db($dbname, $con); echo "database connected !";  //variable declaration  $file="flag_track.txt"; $result=mysql_query("select * d_5"); $total_rows=mysql_num_rows($result); $limit=256;  while($i < $total_rows){     //increasing time limit      set_time_limit(0);     //getting value row of reading     $reading=mysql_result($result,$i,'reading');     //if first flag set          if(!(firstflag())) {             delta();             }     //convert decimal binary , store in db      if(savedelta(decbin($diffrence))== flase){         echo"error saving data in db";          }     } function delta(){          $delta=$flag-$reading;         file_put_contents ($file, $flag."<br>".$delta, file_append)."<br>";                      if( $delta > $limit){                 $flag=$reading;                 file_put_contents ($file, $flag."<br/>".$delta,     file_append)."<br>";                  } }  function firstflag(){ if($flag == null){         //set flag         $flag=$reading;         //saving flag          file_put_contents ($file, $flag, file_append)."<br>";         return true;         }         else {  return false; } }   function savedelta($dif) {  if(mysql_query("insert e_x_1 (delta_of_reading) values ('b" . $dif . "')")){ return true; //on success } else { return false; //on failure }  } ?>  </body> </html>

the error in statement

mysql_query("insert e_x_1 (delta_of_reading) values (b'$dif')");

it should like:

mysql_query("insert e_x_1 (delta_of_reading) values ('b" . $dif . "')");  //i don't know if want `b` there or error

and since function savedelta($dif) called inside while loop print error multiple times. can return error code , check successful execution of query.

function savedelta($dif) {    if(   mysql_query("insert e_x_1 (delta_of_reading) values ('b" . $dif . "')") ){     return true; //on success   } else {     return false; //on failure   }  }

and in while loop check as:

if( savedelta(decbin($diffrence) === false ){   //print error , return or whatever }

Comments

Post a Comment

Popular posts from this blog

basic authentication with http post params android -

i doing basic authentication passing username , password , using basicnamevaluepair sending post params response service. my method: public stringbuilder callservicehttppost(string username, string password, string type) { // create new httpclient , post header httpclient httpclient = new defaulthttpclient(); httppost httppost = new httppost(webservice + type); httpresponse response = null; stringbuilder total = new stringbuilder(); try { url url = new url(webservice + type); /*string base64encodedcredentials = base64.encodetostring((username + ":" + password).getbytes(), base64.url_safe | base64.no_wrap);*/ string base64encodedcredentials = "basic " + base64.encodetostring( (username + ":" + password).getbytes(), base64.no_wrap); httppost.setheader("auth...
Read more

vb.net - Virtual Keyboard commands -

i wondering difference between virtual these keyboard commands is: keyeventf_extendedkey , keyeventf_keyup is. everywhere have looked gives me description based off integers , not want know each of them does. you've tagged question vb.net, these have nothing @ vb.net. they're constants defined in windows header files, use win32 api functions. as far difference, can't tell looking @ values. individual values not particularly important, that's why named identifiers used. what's important used , documentation functions tells mean. the first one, keyeventf_extendedkey , used keybdinput structure (which used along e.g. sendinput function) pass information synthesized keyboard input. if flag used, means scan code should interpreted extended key. technically, means scan code preceded prefix byte value 224 (&he0 in hexadecimal notation). the second one, keyeventf_keyup , 1 of flags available use structure. means key being released (going up)...
Read more

css - Firefox for ubuntu renders wrong colors -

Image
i've got following problem: i'm developing website, while testing around i've noticed firefox , chromium display css bar in different colors. when switched between several machine come conclusion firefox ubuntu problem. on other devices i've tested website. it's fine. the differences between chrome , firefox rendering: firefox: chromium: note: firefox ubuntu problem. does knows why , came solution? https://bugzilla.mozilla.org/show_bug.cgi?id=655637 bug 629312 - firefox displays wrong colors on image (only linux) open about:config , rechange gfx.color_management.mode 2 0.
Read more