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String equality and deletion of variables in php

WBOYOriginal: 2016-07-25 09:07:251032browse

$a='11';
$b=11;
if($a===$b)
{
echo 'strict equality';
}
else if($ a==$b)
{
echo 'equal';
}
else
{
echo 'not equal';
}

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The results are equal.

Here’s how to delete elements in an array:

Examples are as follows:

$_POST=array("firstname"=>'f',"lastname"=>'j',"email"=>"fj@qq.com", "password"=>"123",'rpassword'=>"123");
$user=$_POST;
function deletearray($user)
{
foreach($user as $key => $value )
{
if($key=='firstname')
{
unset($user[$key]);
}
else
{
return true;
}
}
}
deletearray($user);
print_r($user);

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Remarks: At first I couldn't delete firstname. I always thought it was an error with ==. Later I found out that an error occurred when calling the function. If you want to change the incoming array, you should pass in &$user. That is, pass in Only by inserting a reference can the result of the array be changed.

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