Get_functions_calls_PHP_files.php

<?php
// obtener el listado de funciones que llama un objeto llamado conn 
// grep -or  "conn->.*.("  >/tmp/llamadas.txt

$f = file_get_contents('/tmp/llamadas.txt'); 

$lineas = explode("\n" , $f)  ; 
$aux = [ ]; 
foreach($lineas as $l){
    if (strstr($l, 'vendor')===false)
    $aux[] =  firstStringBetween($l,'->', '(').PHP_EOL ; 

}
sort($aux)  ; 
foreach(array_count_values($aux ) as $K=>$V){
    echo trim($K) .'|'. trim($V).PHP_EOL ; 
}



function firstStringBetween($haystack, $start, $end)
{
    return trim(strstr(strstr($haystack, $start), $end, true), $start . $end);
}