Most internal functions have been rewritten so they return TRUE
when successful and FALSE when failing, as opposed to 0 and -1 in
PHP/FI 2.0, respectively. The new behaviour allows for more
logical code, like $fp = fopen("/your/file") or
fail("darn!");. 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.
Example D-9. Migration from 2.0: return values, old code
$fp = fopen($file, "r"); if ($fp == -1); echo("Could not open $file for reading<br />\n"); endif;
Example D-10. Migration from 2.0: return values, new code
$fp = @fopen($file, "r") or print("Could not open $file for reading<br />\n");
Php migration.truefalse Function syntax tag
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Php migration.truefalse syntax tutorial
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