I want my field to accept only integers and i have

问题:

This question is an exact duplicate of:

• Required field that should be filled only with integers 1 answer

I have got my complete project done but it is lacking this one requirement and i'm not able to solve this issue in my project myself.

回答1:

Could you use CodeIgniter's form validation? And set a rule like this:

$this->form_validation->set_rules('yourfield', 'Your field\'s human name', 'required|integer');

This assumes that the field is called yourfield.

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After reading the comments, it seems like you want to check if value in the field is an integer using jQuery. I'd suggest looking into this plugin: jQuery - numeric

There's a good example of to use it here.

Here's the relevant code:

If you had an input like this:

<input class="integer" type="text" />

Then you can validate it, checking that it is an integer, like this:

$(".integer").numeric(false, function() { alert("Integers only"); this.value = ""; this.focus(); });

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However, as JavaScript/jQuery is run on the client-side (and can be bypassed), I would stress that it is very important to also validate on the server-side, in this case using PHP. This excellent answer explains in more detail why both are important.

回答2:

USE HTML5

<input type="number" min="0" />


<input name="Est_Value" id="estvalue" class="regi_input_1" style="width: 150px; height: 25px;" type="number" min="0" />

Validation Using JavaScript

<input name="Est_Value" id="estvalue" class="regi_input_1" style="width: 150px; height: 25px;" type="text" onkeypress="if ( isNaN( String.fromCharCode(event.keyCode) )){ alert('numbers only'); return false; }" />

Working Demo http://jsfiddle.net/cse_tushar/FEVrB/