array ( 0 => 'index.php', 1 => 'PHP Manual', ), 'head' => array ( 0 => 'UTF-8', 1 => 'zh', ), 'this' => array ( 0 => 'splfileobject.setmaxlinelen.php', 1 => 'SplFileObject::setMaxLineLen', 2 => 'Set maximum line length', ), 'up' => array ( 0 => 'class.splfileobject.php', 1 => 'SplFileObject', ), 'prev' => array ( 0 => 'splfileobject.setflags.php', 1 => 'SplFileObject::setFlags', ), 'next' => array ( 0 => 'splfileobject.tostring.php', 1 => 'SplFileObject::__toString', ), 'alternatives' => array ( ), 'source' => array ( 'lang' => 'en', 'path' => 'reference/spl/splfileobject/setmaxlinelen.xml', ), 'history' => array ( ), ); $setup["toc"] = $TOC; $setup["toc_deprecated"] = $TOC_DEPRECATED; $setup["parents"] = $PARENTS; manual_setup($setup); contributors($setup); ?>

SplFileObject::setMaxLineLen

(PHP 5 >= 5.1.0, PHP 7, PHP 8)

SplFileObject::setMaxLineLen — Set maximum line length

说明

public SplFileObject::setMaxLineLen(int $maxLength): void

Sets the maximum length of a line to be read.

参数

maxLength

The maximum length of a line.

返回值

没有返回值。

错误／异常

Throws DomainException when maxLength is less than zero.

示例

示例 #1 SplFileObject::setMaxLineLen() example

<?php
$file = new SplFileObject("lipsum.txt");
$file->setMaxLineLen(20);
foreach ($file as $line) {
echo $line . "\n";
}
?>

Contents of lipsum.txt

Lorem ipsum dolor sit amet, consectetur adipiscing elit.
Duis nec sapien felis, ac sodales nisl.
Nulla vitae magna vitae purus aliquet consequat.

以上示例的输出类似于：

Lorem ipsum dolor s
it amet, consectetu
r adipiscing elit.

Duis nec sapien fel
is, ac sodales nisl
.

Nulla vitae magna v
itae purus aliquet 
consequat.

参见