PHP 4.0 Bug #6346: preg_replace with arrays truncates results

From: rick@eastcore.net Operating system: Linux (2.2.16) PHP version: 4.0.1pl2 PHP Bug Type: Misbehaving function Bug description: preg_replace with arrays truncates results I noticed that a system which worked fine with PHP3 broke under PHP4. In tracking down the problem I found that preg_replace was the source of the difficulty. The following simple PHP script truncates the returned string: <? $text = "this is some test textthis is some test textthis is some test textthis is some test textthis is some test textthis is some test textthis is some test textthis is some test textthis is some test textthis is some test textthis is some test textthis is some test textthis is some test textthis is some test textthis is some test textthis is some test textthis is some test textthis is some test tex tthis is some test textthis is some test textthis is some test textthis is some test textthis is some test textthis is some test textthi s is some test textthis is some test textthis is some test textthis is some test textthis is some test textthis is some test textthis is some test textthis is some test textthis is some test textthis is some test textthis is some test text\n"; $array1 = array(); $array2 = array(); $text2 = preg_replace($array1, $array2, $text); print "text = $text2<br>\n"; ?> It appears that using empty array(s) in a preg_replace truncates the string returned -- which differs significantly from the no-op behavior in php3. The configure command is: configure --with-mysql=/usr --enable-versioning --with-apache=../apache_1.3.12