What is the difference between php fgetc() and fgets()

Difference: 1. fgetc() is used to read a character from an open file and return a string containing one character; while fgets() is used to read a line from an open file data and returns a string of specified length. 2. The fgetc() function only accepts one parameter, while the fgets() function accepts two parameters.

The operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer

In php, fgetc() and fgets( ) can read data from files, but there are differences, which are introduced below.

php The difference between fgetc() and fgets()

1. Functional difference

fgetc(): Read a character from an open file

fgets(): Read a line of data from an open file

2. Syntax difference

fgetc(): Only accepts one parameter

fgetc($handle)

• The parameter $handle is the opened file

fgets(): Yes Accepts two parameters

fgets($handle[,$length])

• The parameter $handle is the file to be opened

• The parameter $length is an optional parameter, used to set the read the data length.

3. Return value difference

fgetc() function can return a string containing one character, which is obtained from $handle obtained from the file pointed to. Returns FALSE when EOF is encountered.

fgets() function can read a line from the specified file and return a string of specified length. Stops after a newline character, EOF, or after reading $length-1 bytes. If the $length parameter is omitted, the default read length is 1k (1024 bytes).

Extended knowledge:

We have a text file named "test.txt" with the content:

• Use fgetc() to read the file character by character

<?php
header("Content-Type: text/html;charset=utf-8");    //设置字符编码
$handle = fopen(&#39;./test.txt&#39;, &#39;r&#39;);                 //打开文件
if (!$handle) {                                     //判断文件是否打开成功
    echo &#39;文件打开失败！&#39;;
}
while (false !== ($char = fgetc($handle))) {        //循环读取文件内容
    echo $char;
}
fclose($handle);                                    //关闭文件
?>

• Use fgets() to read the file line by line

<?php
header("Content-Type: text/html;charset=utf-8");    //设置字符编码
$handle = fopen(&#39;./test.txt&#39;, &#39;r&#39;);                 //打开文件
if (!$handle) {                                     //判断文件是否打开成功
    echo &#39;文件打开失败！&#39;;
}
while (false !== ($char = fgets($handle,1024))) {        //循环读取文件内容
    echo $char."<br>";
}
fclose($handle);                                    //关闭文件
?>

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