Php/docs/internals2.opcodes.init-fcall-by-name

From Get docs

INIT_FCALL_BY_NAME

PHP code

<?php/* * prepare for a function call to function value1 * opcode number: 59 */$x = 'phpinfo';$a = $x();?>

PHP opcodes

Function name: (null)

Compiled variables: !0=$x, !1=$a

line # op fetch ext return operands
6 0 ASSIGN       !0,'phpinfo'
7 1 INIT_FCALL_BY_NAME       !0
  2 DO_FCALL_BY_NAME   0    
  3 ASSIGN       !1,$1
8 4 RETURN       1