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常用的字符串函数2018年8月27日作业
吕小布的博客
Original
582 people have browsed it

实例

<?php
//usort()二维数组的排序
$arry = [
    ['name'=>'li', 'grade'=>100],
    ['name'=>'liu', 'grade'=>30],
    ['name'=>'wang', 'grade'=>80],
];

usort($arry,function($a,$b){
    return strcmp($a['grade'], $b['grade']);
});

echo var_export($arry),'<hr>';
//实例演示str_replace(), substr_replace()
$a='My english is very good';
echo substr($a,11,2),'<br>';//获取指定位置或区间内的字符串
echo strstr($a,'very'),'<br>';//查找字符串的首次出现
echo strstr($a,'very',true),'<br>';//查找字符串的首次出现
echo strpos($a,'is'),'<hr>';//查找字符串首次出现的位置

//str_replace()
echo str_replace('very','非常',$a),'<br>';
echo str_replace(['english','is','very'],['英语','是','非常'],$a),'<br>';
//substr_replace()
echo substr_replace($a,'我的英语非常好',0),'<br>';//整体替换
echo substr_replace($a,'非常',11,0),'<br>';//插入
echo substr_replace($a,'非常',11,2),'<br>';//替换is
echo substr_replace($a,'',11,2),'<br>';//删除替换

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Correction status:qualified

Teacher's comments:加上自己的总结就更完美了!
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