Attributes of input in PHP

This article mainly introduces the hidden, read-only and restricted attributes of input. By changing the attributes of input, the input box can be limited in length and cannot be modified. Friends in need can refer to it. I hope it can help everyone.

Hide

<input type="hidden">

Readonly

<input type="text" readonly>

Invalid

&lt ;input type="text" disabled>

Limitations

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ENTER key moves the cursor to the next input box

<input onkeydown="if(event.keyCode==13)event.keyCode=9">

Shield input method

<input type="text" name="url" style="ime-mode:disabled" onkeydown="if(event.keyCode==13)event.keyCode=9">

There are two ways to achieve the read-only effect of input:

disabled and readonly.

Of course the two effects can only be read but not edited, but they are very different.

Disabled indicates that the input is invalid and its value will not be passed to any program, such as asp, PHP, etc.

Readonly only cannot be edited and does not affect the transfer of its value.

Disabled use:

<INPUT type=”text” name=”username” value=”james” disabled> 
Readonly使用： 
<INPUT type=”text” name=”partNumber” value=”1500″ readonly>

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php://input input stream detailed explanation

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