Change variable type from string to binary

Question

I have a string like :

  $str = "01110001";

and I want to change its type to binary with :

$bin = (binary) $str;

( because I want to inverse it ) But, when I try to var_dump($bin), I get :

string(8) "01110001"

Can anyone tell me what I'm missing ?

Shiplu Mokaddim · Accepted Answer · 2014-06-08 05:37:06Z

1

Binary is not datatype. Hence you can not cast with it.

However you can representation of binary to decimal using bindec function.

$bin = (string)bindec($str);

Note: Every number is stored as binary in memory. So you dont have specifically convert it to binary. Just use bindec and it'll convert it to number. Then it'll be stored in 4 byte integer as binary. If its string then for every digit it'll use 8 bytes.

edited Jun 8, 2014 at 5:37

answered Jun 8, 2014 at 5:13

Shiplu Mokaddim

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8 Comments

Alireza Fallah Over a year ago

I don't want to change the type to integer. I have the binary mode of a variable but its type is string, I want to change the type to binary so I can inverse it

Shiplu Mokaddim Over a year ago

You can not change it to binary. You need to change it to numeric type. I have updated my answer.

Alireza Fallah Over a year ago

but I need to act with this like binary, I want to inverse the variable : 1010001 --> 0101110 with ~

laurent Over a year ago

@shiplu.mokadd.im 's answer is correct but you don't need to cast to string if you need an integer. Just $bin = bindec($str); should do it.

Alireza Fallah Over a year ago

@this.lau_ Are you guys listening to me? I dont want integer. I want binary, I want to inverse the variable like I said in the above comment

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