javascript - The sessions only store data for a second before being changed the last sessions value -


when click sort date created button, string date passed function sort() , alert 1 (see code) prints string date. string date stored in session in first if statement , alert 2 prints date. issue date being stored temporarily , alert 3 alerts service, no matter type. if change order of if statements, last if statement's string somehow stored in session.

<?php session_start(); ?> <html> <head>   <script>     function sort(type){       alert('<?php echo $_session['sort']; ?>');  ///alert 1       if (type == 'date'){        <?php $_session['sort'] = 'date'; ?>        alert('<?php echo $_session['sort']; ?>'); ///alert 2      }      else if (type == 'cost'){        <?php $_session['sort'] = 'cost'; ?>        alert('<?php echo $_session['sort']; ?>');      }      else if (type == 'service'){        <?php $_session['sort'] = 'service'; ?>        alert('<?php echo $_session['sort']; ?>');      }       alert('<?php echo $_session['sort']; ?>'); ///alert 3   }   </script> </head> <body>   <input type="button" onclick="sort('date');" value="sort date created">   <input type="button" onclick="sort('cost');" value="sort cost">   <input type="button" onclick="sort('service');" value="sort service"> </body> </html>

you confused difference between client side , server side code. have written following code:

alert('service'); <?php     $_session['sort'] = 'date';     $_session['sort'] = 'cost';     $_session['sort'] = 'service'; ?> if (type == 'date'){      alert('service'); ///alert 2 } else if (type == 'cost'){      alert('service'); } else if (type == 'service'){      alert('service'); }

php not respect javascript if statements. php compile static web page latter part of code have written.

i feel answer trying explain difference between client-side , server-side code little broad , long-winded stackoverflow, there plenty resources out there on topic.


Comments

Post a Comment

Popular posts from this blog

Is there a better way to structure post methods in Class Based Views -

i'm using class based views in django , never specify url in ajax calls , omit action parameter in form because know these requests go through post method of class based view. notice view - profile page make many requests depending on user updating on page - post method become convoluted , if/else mess example: def post(self, request, *args, **kwargs): # handle user changing available date if request.post.get('availabledate') != none: self.updateavailabledate(request) return jsonresponse({'result':'success'}) if request.post.get('newprojectname') != none: creative_user = creativeuserprofile.objects.get(id = request.user.id) project = project.create_project(creative_user, request.post['newprojectname']) project.save() return jsonresponse({'projectid': project.id }) if request.post.get('projectimage') != none , request.files['file']: proj
Read more

performance - Why is XCHG reg, reg a 3 micro-op instruction on modern Intel architectures? -

i'm doing micro-optimization on performance critical part of code , came across sequence of instructions (in at&t syntax): add %rax, %rbx mov %rdx, %rax mov %rbx, %rdx i thought had use case xchg allow me shave instruction , write: add %rbx, %rax xchg %rax, %rdx however, dimay found agner fog's instruction tables , xchg 3 micro-op instruction 2 cycle latency on sandy bridge, ivy bridge, broadwell, haswell , skylake. 3 whole micro-ops , 2 cycles of latency! 3 micro-ops throws off 4-1-1-1 cadence , 2 cycle latency makes worse original in best case since last 2 instructions in original might execute in parallel. now... cpu might breaking instruction micro-ops equivalent to: mov %rax, %tmp mov %rdx, %rax mov %tmp, %rdx where tmp anonymous internal register , suppose last 2 micro-ops run in parallel latency 2 cycles. given register renaming occurs on these micro-architectures, though, doesn't make sense me done way. why wouldn't register renamer
Read more

jquery - Responsive Navbar with Sub Navbar -

good day, forgive me nav vocabulary not best. if question confusing apologize. i'm working on navigation bar needs centered on page @ 768px , above. items in nav open (or perhaps toggle) subnav lives directly below. these nav should appear centered on page. i have been able work through responsive portion of nav bar, having main items align vertically , sub nav menu of each item roll out below, , gave them indent separation. working well. however, issue not responsive side, behavior @ width greater 768px. happens toggling menu's sub navigation pushes other main items down page below sub nav. here's code: $(document).ready(function () { //stick in fixed 100% height behind navbar don't wrap $('#slide-nav.navbar-inverse').after($('<div class="inverse" id="navbar-height-col"></div>')); $('#slide-nav.navbar-default').after($('<div id="navbar-height-col"></d
Read more