PHP - can't delete mysqli values in the way I want -


sorry ambiguous title, don't know how else name this. need delete specific values in specific quantities database. have table numbers. looks this

1,2(1),3,4,5(6),6(3),7(2),8,9(4),10

the numbers in brackets represent how many times base number found in mysqli database. form lets me select multiple duplicate numbers , how many duplicates of number want delete. example have selected:

2(1),5(4),9(2)

this code gives me values imperfect because receive numbers have @ least 1 duplicate in database , empty values there no number selected , normal numbers when it's selected.

<input type="number" name="quantity[]" id="quantity" min="0" max='<?php echo "$count[$item]"?>' /> input type="hidden" name="hidden[]" id="hidden" value='<?php echo "$item" ?>' />

my thought process needed build code knew number selected amount of times selected. wanted make associative array 2 values supposed receive. works, gives me information, can't make delete selected items number of times want, deletes existing duplicates of selected items.

 $arr1 = array();   $arr2 = array();   $newassoc = array();   if( isset( $_post['submit'] ) ) {    $quantity = $_post['quantity'];    $hidden = $_post['hidden'];     foreach( $hidden $var1 ) {      $arr1[] = $var1;    }     foreach( $quantity $var2 ) {      $arr2[] = $var2;    }     $newassoc = array_combine( $arr1, $arr2 );     foreach( $newassoc $key => $val ) {      if( !empty($val)) {        $i = 1;         while( $i <= $val ) {          $delete = mysqli_query( $db, "delete duplicates                                         numbers=$key" );           ++$i;         }     }   } }

i've tried quite few things , i'm in bit of pickle because nothing worked , i'm out of ideas.

expected result: repeat myself, need delete specific values in specific quantities database.

sorry wall of text , horrendous code/coding practice/coding logic, still bit new both coding , stackoverflow.

thank riggsfolly, answer has fixed problems. if has interesting add don't mind. thank !

this portion of code changed in order expected result fullfiled, if needs it:

  foreach( $newassoc $key => $val ) {      if( !empty($val)) {           $delete = mysqli_query( $db, "delete duplicates                                        numbers=$key                                        limit $val" );    }

on single tables, can limit number of rows deleted using limit.

your query delete table key=value limit 10. see the official documentation of mysql.


Comments

Post a Comment

Popular posts from this blog

c# - Validate object ID from GET to POST -

i have method allows user access comment have made on site. have post method lets them update comment. my normal solution send entire comment model through, let them update it, update on database when post back. involve sending commentid through in hiddenfor , can manipulated. how can verify commentid sent in get method same i'm getting in post , not able alter comment wish? how can verify commentid sent in method same i'm getting in post? basically have validate following things in post - user logged-in user. authenticated users post comments. commentid in post , should valid commentid , should present in database. userid associated logged-in user should same userid associated comment . comment should contain userid column, can check @ time of update. to make sure update happens comment has been sent in get - hold commentid in session , in post action compare commentid value in session .
Read more

node.js - Custom Model Validator SailsJS -

when using custom model validator checks record within model. return within spread doesn't seem end control flow. //post.js model /** * custom validator **/ types: { isuservalid: function(user_id) { var promise = require('bluebird'); promise.all([ user.findone({id: user_id}) ]) .spread(function(user) { console.log(user); if (user === null || user === undefined) { console.log('failed'); return false; }else{ console.log('passed'); return true; } }); } }, my response standard validation failed response. { "error": "e_validation", "status": 400, "summary": "1 attribute invalid", "model": "post", "invalidattributes": { "owner": [ { "rule": "isuservalid", ...
Read more

php - Find a regex to take part of Email -

i have following emails need extract part from: bestellnummer xxx: 1 von xxx, 1er pack ------------- anfang der nachricht ------------- foo bar baz foo bar baz // <<<<< need text here ------------- ende der nachricht ------------- ------------- anfang der nachricht ------------- foo bar baz foo bar baz ------------- ende der nachricht ------------- there 0 unlimited occurences of ------------- anfang der nachricht ------------- ------------- ende der nachricht ------------- and i'm able extract first part regex: $re = "/------------- .*? -------------.?(.*?).?------------- .*? -------------/s"; but, i'm quite new on learning regex, i'm pretty sure there must better regex extract part (foo bar baz foo bar baz) of text between ------------- anfang der nachricht ------------- ------------- ende der nachricht ------------- as can in different languages, i'm using .? to match between hyphens. i...
Read more