实例
<?php /** * Created by PhpStorm. * User: Administrator * Date: 2018/4/18 0018 * Time: 下午 12:58 */ header("content-type:text/html;charset=utf-8"); $address = array('北京', '上海', '深圳', '广州'); for ($i = 0; $i < count($address); $i++) { echo $address[$i] . "<br>"; } echo "<br>"; foreach ($address as $value) { echo $value . "<br>"; } foreach ($address as $key => $value) { echo $key . '=>' . $value . "<br>"; } echo "<br>"; while ($i < count($address)) { echo $address[$i] . "<br>"; $i++; } echo "<br>"; $address = array("北京" => "天安门", "上海" => "东方明珠", "深圳" => "真能吃", "广州" => "发达啊"); //for ($i = 0; $i < count($address); $i++) { // echo $address[$i] . "<br>"; //} echo "<br>"; foreach ($address as $value) { echo $value . "<br>"; } echo "<br>"; foreach ($address as $k => $v) { echo $k . '=>' . $v . "<br>"; } echo "<br>"; echo '<hr>'; /** * array_splice — 把数组中的一部分去掉并用其它值取代 */ $colors = array("red", "green", "blue", "yellow"); echo "相当于删除"; $newColors = array_splice($colors, -3, -2);//如果值为负数 那么计算位置从数组末端前移判断 echo "<pre>"; print_r($newColors); print_r($colors); echo "</pre>"; echo '<hr>'; $colors = array("red", "green", "blue", "yellow"); echo "相当于增加"; array_splice($colors, 2, 3, "123");//单个值直接写 echo "<pre>"; print_r($colors); echo "</pre>"; echo '<hr>'; $colors = array("red", "green", "blue", "yellow"); echo "相当于多个增加"; array_splice($colors, 2, 3, array('sss', '4782', '47;kj'));//多个值用数组替换 echo "<pre>"; print_r($colors); echo "</pre>"; echo '<hr>'; $colors = array("red", "green", "blue", "yellow"); echo "相当于查询对应位置的数据"; $newColors = array_slice($colors, 2, 3); //这个偏移跟上边那个意思一致 echo "<pre>"; print_r($newColors); print_r($colors); echo "</pre>";
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