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55 lines
1.3 KiB
PHP
55 lines
1.3 KiB
PHP
--TEST--
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Test fseek() function : variation functionality beyond file boundaries
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--CREDITS--
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Dave Kelsey <d_kelsey@uk.ibm.com>
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--FILE--
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<?php
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/* Prototype : proto int fseek(resource fp, int offset [, int whence])
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* Description: Seek on a file pointer
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* Source code: ext/standard/file.c
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* Alias to functions: gzseek
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*/
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echo "*** Testing fseek() : variation - beyond file boundaries ***\n";
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$outputfile = __FILE__.".tmp";
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$h = fopen($outputfile, "wb+");
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for ($i = 1; $i < 10; $i++) {
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fwrite($h, chr(0x30 + $i));
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}
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echo "--- fseek beyond start of file ---\n";
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var_dump(fseek($h, -4, SEEK_SET));
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echo "after -4 seek: ".bin2hex(fread($h,1))."\n";
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var_dump(fseek($h, -1, SEEK_CUR));
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echo "after seek back 1: ".bin2hex(fread($h,1))."\n";
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var_dump(fseek($h, -20, SEEK_CUR));
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echo "after seek back 20: ".bin2hex(fread($h,1))."\n";
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echo "--- fseek beyond end of file ---\n";
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var_dump(fseek($h, 16, SEEK_SET));
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fwrite($h, b"end");
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fseek($h ,0, SEEK_SET);
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$data = fread($h, 4096);
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echo bin2hex($data)."\n";
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fclose($h);
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unlink($outputfile);
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echo "Done";
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?>
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--EXPECTF--
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*** Testing fseek() : variation - beyond file boundaries ***
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--- fseek beyond start of file ---
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int(-1)
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after -4 seek:
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int(0)
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after seek back 1: 39
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int(-1)
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after seek back 20:
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--- fseek beyond end of file ---
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int(0)
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31323334353637383900000000000000656e64
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Done
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