Five methods for PHP to read file content

Share the following five methods for php to read file content: Well, after writing, I found that all the files are not closed. In actual application, please pay attention to the five methods of disabling fclose ($ fp) php to read file content

Share the following five methods for php to read file content: Well, after writing, I found that all the files are not closed. In actual application, close fclose ($ fp );
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Php reads the file content:

----- Method 1 ----- fread ()--------

<? Php $ file_path = "test.txt"; if (file_exists ($ file_path) {$ fp = fopen ($ file_path, "r"); $ str = fread ($ fp, filesize ($ file_path); // specify the read size. here, the entire file is read. echo $ str = str_replace ("\ r \ n ","
", $ Str) ;}?>

-------- Method 2 ------------

<? Php $ file_path = "test.txt"; if (file_exists ($ file_path) {$ str = file_get_contents ($ file_path ); // read the entire file content into a string $ str = str_replace ("\ r \ n ","
", $ Str); echo $ str ;}?>

----- Method 3 ------------

<? Php $ file_path = "test.txt"; if (file_exists ($ file_path) {$ fp = fopen ($ file_path, "r"); $ str = ""; $ buffer = 1024; // read 1024 bytes each time while (! Feof ($ fp) {// cyclically read until the entire file is read $ str. = fread ($ fp, $ buffer);} $ str = str_replace ("\ r \ n ","
", $ Str); echo $ str ;}?>

------- Method 4 --------------

<? Php $ file_path = "test.txt"; if (file_exists ($ file_path) {$ file_arr = file ($ file_path); for ($ I = 0; $ I
 ";}/* Foreach ($ file_arr as $ value) {echo $ value ."
";} */}?>

---- Method 5 --------------------

<? Php $ file_path = "test.txt"; if (file_exists ($ file_path) {$ fp = fopen ($ file_path, "r"); $ str = ""; while (! Feof ($ fp) {$ str. = fgets ($ fp); // read data row by row. If fgets does not write the length parameter, the default value is 1 k .} $ Str = str_replace ("\ r \ n ","
", $ Str); echo $ str ;}?>

The above content is shared with you five ways PHP can read file content.