20 lines
823 B
PHP
20 lines
823 B
PHP
<?php
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$filename = "data/07.txt";
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$total = filesize($filename);
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if (is_file($filename)) {
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echo "文件总字节数：" . $total . "<br>";
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$fopen = fopen($filename, 'rb');
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echo "初始指针位置是：" . ftell($fopen) . "<br>";
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fseek($fopen, 30);
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// 07.txt原先是UTF-8 with BOM编码，现在已经转换为UTF-8编码，故不需要33
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echo "使用fseek()函数后指针位置：" . ftell($fopen) . "<br>";
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echo "输出当前指针后面的内容：" . fgets($fopen) . "<br>";
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if (feof($fopen))
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echo "当前指针指向文件末尾：" . ftell($fopen) . "<br>";
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rewind($fopen);
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echo "使用rewind()函数后指针的位置：" . ftell($fopen) . "<br>";
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echo "输出前31字节的内容：" . fgets($fopen, 31);
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fclose($fopen);
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} else {
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echo "文件不存在";
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} |