.php_cs_ruleset.xml

<?xml version="1.0"?>
<ruleset name="Custom Standard">
    <description>A custom coding standard</description>
    <ini name="memory_limit" value="64M"/>
    <rule ref="Generic.PHP.ForbiddenFunctions">
        <properties>
            <property
                    name="forbiddenFunctions"
                    type="array"
                    value="var_dump=>null,dump=>null,echo=>null,print=>null,eval=>null,die=>null,phpinfo=>null,mail=>mb_send_mail,strlen=>mb_strlen,strpos=>mb_strpos,strrpos=>mb_strrpos,substr=>mb_substr,strtolower=>mb_strtolower,strtoupper=>mb_strtoupper,
stripos=>mb_stripos,strripos=>mb_strripos,strstr=>mb_strstr,stristr=>mb_stristr,strrchr=>mb_strrchr,substr_count=>mb_substr_count,ereg=>mb_ereg,eregi=>mb_eregi,ereg_replace=>mb_ereg_replace,eregi_replace=>mb_eregi_replace,split=>mb_split"
            />
        </properties>
    </rule>
</ruleset>