<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <HTML ><HEAD ><TITLE >Function TRUE/FALSE return values</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.7"><LINK REL="HOME" TITLE="Manual PHP" HREF="index.html"><LINK REL="UP" TITLE="Migrating from PHP/FI 2 to PHP 3" HREF="migration.html"><LINK REL="PREVIOUS" TITLE="Short-circuited boolean evaluation" HREF="migration.booleval.html"><LINK REL="NEXT" TITLE="Other incompatibilities" HREF="migration.other.html"><META HTTP-EQUIV="Content-type" CONTENT="text/html; charset=ISO-8859-2"></HEAD ><BODY CLASS="section" BGCOLOR="#FFFFFF" TEXT="#000000" LINK="#0000FF" VLINK="#840084" ALINK="#0000FF" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="3" ALIGN="center" >Manual PHP</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="migration.booleval.html" ACCESSKEY="P" >Înapoi</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" >Anexa D. Migrating from PHP/FI 2 to PHP 3</TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="migration.other.html" ACCESSKEY="N" >Înainte</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><DIV CLASS="section" ><H1 CLASS="section" ><A NAME="migration.truefalse" >Function <TT CLASS="constant" ><B >TRUE</B ></TT >/<TT CLASS="constant" ><B >FALSE</B ></TT > return values</A ></H1 ><P > Most internal functions have been rewritten so they return <TT CLASS="constant" ><B >TRUE</B ></TT > when successful and <TT CLASS="constant" ><B >FALSE</B ></TT > when failing, as opposed to 0 and -1 in PHP/FI 2.0, respectively. The new behaviour allows for more logical code, like <VAR CLASS="literal" >$fp = fopen("/your/file") or fail("darn!");</VAR >. Because PHP/FI 2.0 had no clear rules for what functions should return when they failed, most such scripts will probably have to be checked manually after using the 2.0 to 3.0 convertor. </P ><P > <TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" CLASS="EXAMPLE" ><TR ><TD ><DIV CLASS="example" ><A NAME="AEN132854" ></A ><P ><B >Exemplu D-9. Migration from 2.0: return values, old code</B ></P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><code><font color="#000000"> $fp = fopen($file, "r");<br />if ($fp == -1);<br /> echo("Could not open $file for reading<br />\n");<br />endif;</font> </code></TD ></TR ></TABLE ></DIV ></TD ></TR ></TABLE > <TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" CLASS="EXAMPLE" ><TR ><TD ><DIV CLASS="example" ><A NAME="AEN132857" ></A ><P ><B >Exemplu D-10. Migration from 2.0: return values, new code</B ></P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><code><font color="#000000"> $fp = @fopen($file, "r") or print("Could not open $file for reading<br />\n");</font> </code></TD ></TR ></TABLE ></DIV ></TD ></TR ></TABLE > </P ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE SUMMARY="Footer navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="migration.booleval.html" ACCESSKEY="P" >Înapoi</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="index.html" ACCESSKEY="H" >Acasã</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="migration.other.html" ACCESSKEY="N" >Înainte</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >Short-circuited boolean evaluation</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="migration.html" ACCESSKEY="U" >Sus</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >Other incompatibilities</TD ></TR ></TABLE ></DIV ></BODY ></HTML >