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How to remove specified characters in PHP?

GuanhuiOriginal: 2020-06-12 17:01:546331browse

How to remove specified characters in PHP?

In PHP, you can use the "str_replace()" function to remove specified characters. This function will replace the substring. Its syntax is "str_replace(sea,rep,sub)". When using Just call this function to replace the specified character with nothing.

Code example

Basic example

<?php
// 赋值: <body text=&#39;black&#39;>
$bodytag = str_replace("%body%", "black", "<body text=&#39;%body%&#39;>");
// 赋值: Hll Wrld f PHP
$vowels = array("a", "e", "i", "o", "u", "A", "E", "I", "O", "U");
$onlyconsonants = str_replace($vowels, "", "Hello World of PHP");
// 赋值: You should eat pizza, beer, and ice cream every day
$phrase  = "You should eat fruits, vegetables, and fiber every day.";
$healthy = array("fruits", "vegetables", "fiber");
$yummy   = array("pizza", "beer", "ice cream");
$newphrase = str_replace($healthy, $yummy, $phrase);
// 赋值: 2
$str = str_replace("ll", "", "good golly miss molly!", $count);
echo $count;
?>

Replacement example

<?php
// 替换顺序
$str     = "Line 1\nLine 2\rLine 3\r\nLine 4\n";
$order   = array("\r\n", "\n", "\r");
$replace = &#39;<br />&#39;;
// 首先替换 \r\n 字符，因此它们不会被两次转换
$newstr = str_replace($order, $replace, $str);
// 输出 F ，因为 A 被 B 替换，B 又被 C 替换，以此类推...
// 由于从左到右依次替换，最终 E 被 F 替换
$search  = array(&#39;A&#39;, &#39;B&#39;, &#39;C&#39;, &#39;D&#39;, &#39;E&#39;);
$replace = array(&#39;B&#39;, &#39;C&#39;, &#39;D&#39;, &#39;E&#39;, &#39;F&#39;);
$subject = &#39;A&#39;;
echo str_replace($search, $replace, $subject);
// 输出: apearpearle pear
// 由于上面提到的原因
$letters = array(&#39;a&#39;, &#39;p&#39;);
$fruit   = array(&#39;apple&#39;, &#39;pear&#39;);
$text    = &#39;a p&#39;;
$output  = str_replace($letters, $fruit, $text);
echo $output;
?>

How to remove specified characters in PHP?

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