RegEx to match transaction id?

[Tonako]

Hello all

Please help me make a regular expression for PHP

[a-zA-Z0-9] and 65 characters?

'/^[a-zA-Z0-9]{65}$/' - true ?)))

[jeffg]

Hello all

Please help me make a regular expression for PHP

[a-zA-Z0-9] and 65 characters?

'/^[a-zA-Z0-9]{65}$/' - true ?)))

Should be a-f and only 64 chars (32bytes):

Code:

[a-fA-F0-9]{64}