Implementation code for PHP read-write files

$fp = fopen ("Test.txt", "R"); ?> Copy Code 2.fclose (Close file) syntax: fclose (filepointer) filepointer, the file pointer to be closed. If successful, the Fclose function returns TRUE if the Fclose function returns FALSE if it fails. Example: $fp = fopen ("Test.txt", "R"); Fclose ($FP); ?> Copy Code 3.feof (detects whether the end of file has been reached) syntax: feof (filepointer) Filepointer, the pointer to the file to be detected, must point to a file that was successfully opened without closing. The feof function returns TRUE if the file pointer is to the end of the file or if an error occurs. Example: $fp = fopen ("Test.txt", "R"); while (! feof ($FP)) { Echo fgets ($FP). " "; } Fclose ($FP); ?> Copy Code 4.fgets (reads a line from the file pointer) syntax: fgets (filepointer) filepointer, the file pointer to be read. If successful, reads a row from the file and returns a string, FALSE if it fails. Example: $fp = fopen ("Test.txt", "R"); if ($FP) { For ($i =1;! feof ($fp); $i + +) { echo "line". $i. ":". Fgets ($FP). " "; } } Else { echo "Failed to open file"; } Fclose ($FP); ?> Copy Code Suppose Test.txt's content is: Hello Worldhello cnblogshello Heihaozihello The Everyone page output results in: Row 1:hello World row 2:hello cnblogs line 3:hello H Eihaozi Line 4:hello Everyone 5.fwrite (write file) syntax: fwrite (filepointer,string) filepointer, the file pointer to be written. String that is to be written. If successful, returns the number of characters written, or FALSE if it fails. Example: $fp = fopen ("Test.txt", "w");//file is emptied and then written if ($FP) { $count = 0; for ($i =1; $i <=5; $i + +) { $flag =fwrite ($fp, "line". $i. ":". " Hello world!\r\n "); if (! $flag) { echo "Failed to write to file "; Break } $count + = $flag; } echo "Total write". $count. " Characters "; } Else { echo "Failed to open file"; } Fclose ($FP); ?> Copy Code The result of the page output is: Write 100 characters in total The Test.txt file is written: line 1:hello world! row 2:hello world! row 3:hello world! row 4:hello world! row 5:hello world!

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