- preg_match: documentation ( source)
<?php
$string = 'http://www.bidiip.mx/wp-content/uploads/2015/11/GAMA-DE-MECHAS-BIDIIP.pdf';
if(preg_match('/\bGAMA\b.\bDE\b.\bMECHAS\b.\bBIDIIP\b/i',$string)){
echo "Simona";
}
$string2 = 'http://www.bidiip.mx/wp-content/uploads/2015/11/fichas-TECNICAS.pdf';
if(preg_match('/\bGAMA\b.\bDE\b.\bMECHAS\b.\bBIDIIP\b/i',$string2)){
echo "Simona23";
}