Solution to garbled Chinese text watermark in php: 1. Remove the "--enable-gd-jis-conv" option and recompile php; 2. Convert characters to html entities through "mb_convert_encoding".
The operating environment of this article: windows7 system, PHP7.1 version, DELL G3 computer
php uses the Gd library to add garbled text watermarks Problems and solutions
Recently a project underwent server migration. After deployment, it was discovered that one of the functions of adding watermark text to pictures had garbled problems. Confirm that there is no problem with the function code, and at the same time the project code They all use UTF-8 encoding, and there is no encoding problem. We also checked and ruled out the possibility of problems with the font file. Finally, after consulting the information, we locked a PHP compilation parameter --enable-gd-jis-conv.
--enable-gd-jis-conv:
If the –enable-gd-jis-conv option is enabled when compiling PHP, then non-ASCII characters (such as Chinese characters, pinyin, Greek and arrows) will be regarded as EUC-JP encoding, which will eventually lead to normal Chinese characters become garbled
Solution:
1. Remove the --enable-gd-jis-conv option and recompile php
2 .Convert characters to html entities
mb_convert_encoding ('测试', 'HTML-ENTITIES', 'UTF-8');
[Recommended learning: "PHP Video Tutorial"]
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实现方法:1、使用“sleep(延迟秒数)”语句,可延迟执行函数若干秒;2、使用“time_nanosleep(延迟秒数,延迟纳秒数)”语句,可延迟执行函数若干秒和纳秒;3、使用“time_sleep_until(time()+7)”语句。

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方法:1、用“str_replace(" ","其他字符",$str)”语句,可将nbsp符替换为其他字符;2、用“preg_replace("/(\s|\ \;||\xc2\xa0)/","其他字符",$str)”语句。

php判断有没有小数点的方法:1、使用“strpos(数字字符串,'.')”语法,如果返回小数点在字符串中第一次出现的位置,则有小数点;2、使用“strrpos(数字字符串,'.')”语句,如果返回小数点在字符串中最后一次出现的位置,则有。

在PHP中,可以利用implode()函数的第一个参数来设置没有分隔符,该函数的第一个参数用于规定数组元素之间放置的内容,默认是空字符串,也可将第一个参数设置为空,语法为“implode(数组)”或者“implode("",数组)”。

php字符串有下标。在PHP中,下标不仅可以应用于数组和对象,还可应用于字符串,利用字符串的下标和中括号“[]”可以访问指定索引位置的字符,并对该字符进行读写,语法“字符串名[下标值]”;字符串的下标值(索引值)只能是整数类型,起始值为0。


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