php - function PDO query and multidimansional array -


i'm trying multidimensional array returned function.

i want have column names first level , data second level.

array[columnname][data]

i can var_dump() function , correct output, can't echo() output.

<?php  function fetch_columname($schema,$tablename) {     try     {         $dbh = new pdo("mysql:host=host;dbname='dbname', 'user', 'pass'");         $query = $dbh->prepare("select `column_name`    `information_schema`.`columns` `table_schema`=:schema , `table_name`=:tablename");         $query->bindparam(":schema", $schema);         $query->bindparam(":tablename", $tablename);         $query->execute();          $result = array();         while($row = $query->fetch(pdo::fetch_assoc))         {             $result[] = $row;         }         $dbh = null;     }     catch (pdoexception $e)     {         print "error!: " . $e->getmessage() . "<br/>";         die();     }     return $result; } $columname = array(); $columname = fetch_columname('new_site','users'); $count = count($columname);  for($i=0;$i<$count;$i++) {     echo $columname[$i]; }

from mike's comment:

your function return two-dimensional array written, though not sure why want two-dimensional array considering returning single field in query. change $result[] = $row $result[] = $row['column_name'] , call day.


Comments

Post a Comment

Popular posts from this blog

cakephp - simple blog with croogo -

i not problem, made simple blog in croogo, problem is not adding or modifying or delete, because arabic language ?? function add in controller `public function admin_add() { $this->set('title_for_layout', __('add part')); if (!empty($this->request->data)) { $this->part->create(); if ($this->part->save($this->request->data)) { $this->session->setflash(__('the part has been saved'), 'default', array('class' => 'success')); $this->redirect(array('action' => 'index'));//, $this->part->id)); } else { $this->session->setflash(__('the part not saved. please, try again.'), 'default', array('class' => 'error')); } } }` => model `class part extends appmodel { public $name = 'part'; var $belongst...
Read more

How to group boxplot outliers in gnuplot -

i have large set of data points. try plot them boxplot, of outliers exact same value , represented on line beside each other. found how set horizontal distance between outliers in gnuplot boxplot , doesn't much, apparently not possible. is possible group outliers together, print 1 point , print number in brackets beside indicate how many points there are? think make more readable in graph. for information, have 3 boxplots 1 x value , times 6 in 1 graph. using gnuplot 5 , played around pointsize, doesn't reduce distance anymore. hope can help! edit: set terminal pdf set output 'dat.pdf' file0 = 'dat1.dat' file1 = 'dat2.dat' file2 = 'dat3.dat' set pointsize 0.2 set notitle set xlabel 'x' set ylabel 'y' header = system('head -1 '.file0); n = words(header) set xtics ('' 1) set [i=1:n] xtics add (word(header, i) i) set style data boxplot plot file0 using (1-0.25):1:(0.2) boxplot lw 2 lc rgb '#8b0000...
Read more

bash - Performing variable substitution in a string -

i have string contains use of variable, , i'd substitute variable's value string. right best have is #!/bin/bash foo='$name; echo bar' name="the name" expanded="$(eval echo "$foo")" echo "$expanded" which has obvious defects: prints the name bar while i'd print the name; echo bar instead of eval can bash's regex matching bash's string replacement: foo='$name; echo bar' name="the name" [[ "$foo" =~ \$([[:alnum:]]+) ]] && s="${!bash_rematch[1]}" && expanded="${foo/\$${bash_rematch[1]}/$s}" echo "$expanded" name; echo bar
Read more