PHP强制转换不起作用

Question

Hi I am a newbie and trying to fixing a tiny problem since 24hrs but still no luck.

<?php
$MOBILE=7372739; 
$PASSWORD="some_pass";

$PASSWORD=(string)$PASSWORD;
$MOBILE=(string)$MOBILE;  
//even tried $MOBILE="".$MOBILE; and $MOBILE="$MOBILE";


if(!(isset($PASSWORD)&& !empty($PASSWORD) && strlen($PASSWORD<=50))){
die("break1");
}

if(!(isset($MOBILE)&& !empty($MOBILE) && strlen($MOBILE<=50))){
die("break2");
}

?>

OUTPUT: break2

If I am using string $MOBILE="xyz"; not getting break2.

Why always getting break2? Please help. Thank you

Answer 1

You are checking to see if $MOBILE is smaller than 50, and it is, so the script dies, the < needs to be a > (in one scenario of what you may want), see below

<?php
$MOBILE=7372739; 
$PASSWORD="some_pass";

$PASSWORD=(string)$PASSWORD;
$MOBILE=(string)$MOBILE;  
//even tried $MOBILE="".$MOBILE; and $MOBILE="$MOBILE";


if(!(isset($PASSWORD)&& !empty($PASSWORD) && strlen($PASSWORD<=50))){
die("break1");
}

if(!(isset($MOBILE)&& !empty($MOBILE) && strlen($MOBILE>=50))){
die("break2");
}

?>

But that's not your problem is it?

You are additionally turning $MOBILE into a string right there in your code, and strlen checks the string length. If you want to check the value of it and not the length of the string, remove $MOBILE=(string)$MOBILE; and remove the strlen from the mobile check and then you can switch that $MOBILE sign back to <