Opcode Descriptions and Examples
PHP Manual

DO_FCALL

PHP code

<?php
/*
 * Call a function.  Following multiple SEND_VAL, SEND_VAR or SEND_REF.
 * opcode number: 60
 */
$a phpinfo();
?>

PHP opcodes

Function name: (null)

Compiled variables: !0=$a

line#op fetchextreturn operands
60 DO_FCALL  0  'phpinfo'
 1 ASSIGN     !0,$0
72 RETURN     1

Opcode Descriptions and Examples
PHP Manual