Home Backend Development PHP Tutorial Some examples of php substr_replace replacement string_PHP tutorial

Some examples of php substr_replace replacement string_PHP tutorial

Jul 13, 2016 am 10:50 AM
php replace str substr and string Example replace have

substr_replace is a bit like str_replace in that it directly replaces part of the string. Let me introduce it to you. How to do it.

The substr_replace() function replaces part of a string with another string.

Usage

substr_replace(string,replacement,start,length)

Note that when the string contains Chinese characters, garbled characters will appear without special processing.

The code is as follows Copy code
 代码如下 复制代码

$string1="123456789";

echo substr_replace($string1,'###',0);
//###
echo substr_replace($string1,'###',5);
//12345###

echo substr_replace($string1,'###',0,0);
//###123456789

echo substr_replace($string1,'###',8,-2);
//12345678###9

echo substr_replace($string1,'###',-6,-1);
//123###9
echo "n";
echo substr_replace($string1,'###',-1);
//123###9
echo "n";
echo substr_replace($string1,'###',1,-1);
//1###9

echo substr_replace($string1,'###',1,1);
//1###3456789
?>

$string1="123456789";

echo substr_replace($string1,'###',0);

//###
代码如下 复制代码
$var = 'ABCDEFGH:/MNRPQR/';
echo "Original: $var
n";
 /* These two examples replace all of $var with 'bob'. */
 echo substr_replace($var, 'bob', 0) . "
n";
 echo substr_replace($var, 'bob', 0, strlen($var)) . "
n";
 /* Insert 'bob' right at the beginning of $var. */
 echo substr_replace($var, 'bob', 0, 0) . "
n";
 /* These next two replace 'MNRPQR' in $var with 'bob'. */
 echo substr_replace($var, 'bob', 10, -1) . "
n";
 echo substr_replace($var, 'bob', -7, -1) . "
n";
 /* Delete 'MNRPQR' from $var. */
 echo substr_replace($var, '', 10, -1) . "
n";
?>
echo substr_replace($string1,'###',5);

//12345###

echo substr_replace($string1,'###',0,0);
//###123456789

echo substr_replace($string1,'###',8,-2);
//12345678###9

echo substr_replace($string1,'###',-6,-1);

//123###9

echo "n";

echo substr_replace($string1,'###',-1);

//123###9

echo "n";
 代码如下 复制代码
$longString = 'abcdefghijklmnopqrstuvwxyz0123456789z.jpg';
$separator = '...';
$separatorlength = strlen($separator) ;
// 需要保留的字符串
$maxlength = 25 - $separatorlength;
// 从一半的长度开始
$start = $maxlength / 2 ;
// 计算偏移量
$trunc = strlen($longString) - $maxlength;
echo substr_replace($longString, $separator, $start, $trunc);
//prints "abcdefghij...56789z.jpg"
?>
echo substr_replace($string1,'###',1,-1); //1###9 echo substr_replace($string1,'###',1,1); //1###3456789 ?> Example 2 Original: ABCDEFGH:/MNRPQR/ bob bob bobABCDEFGH:/MNRPQR/ ABCDEFGH:/bob/ ABCDEFGH:/bob/ ABCDEFGH:// Replace part of an overly long string with ellipses The following program can keep the beginning and end of an overly long string and replace it with ellipses in the middle.
The code is as follows Copy code
$longString = 'abcdefghijklmnopqrstuvwxyz0123456789z.jpg';<🎜> $separator = '...';<🎜> $separatorlength = strlen($separator) ;<🎜> // Strings that need to be retained <🎜> $maxlength = 25 - $separatorlength;<🎜> // Start with half the length <🎜> $start = $maxlength / 2 ;<🎜> // Calculate offset<🎜> $trunc = strlen($longString) - $maxlength;<🎜> echo substr_replace($longString, $separator, $start, $trunc);<🎜> //prints "abcdefghij...56789z.jpg"<🎜> ?>

Program execution result:

abcdefghijk...456789z.jpg

Program List: Replace extra characters with ellipsis


function truncate($text,$numb)
{
$text = html_entity_decode($text, ENT_QUOTES);
if (strlen($text) > $numb)
{
$text = substr($text, 0, $numb);
$text = substr($text,0,strrpos($text," "));
//This strips the full stop:
If ((substr($text, -1)) == ".")
{
           $text = substr($text,0,(strrpos($text,".")));
} }
$etc = "...";
$text = $text.$etc;
}
$text = htmlentities($text, ENT_QUOTES);
return $text;
}
//Call function
$text = 'welcome to nowamagic, welcome to nowamagic, welcome to nowamagic';
$result = truncate($text, 35);
echo $result;
?>
The code is as follows
 代码如下 复制代码

 
function truncate($text,$numb)
{
$text = html_entity_decode($text, ENT_QUOTES);
if (strlen($text) > $numb)
 {
  $text = substr($text, 0, $numb);
  $text = substr($text,0,strrpos($text," "));
     //This strips the full stop:
     if ((substr($text, -1)) == ".")
  {
         $text = substr($text,0,(strrpos($text,".")));
     }
  $etc = "...";
  $text = $text.$etc;
 }
 $text = htmlentities($text, ENT_QUOTES);
 return $text;
}
//Call function
$text = 'welcome to nowamagic, welcome to nowamagic, welcome to nowamagic';
$result = truncate($text, 35);
echo $result;
?>

Copy code

Okay, you will probably know what this function does. http://www.bkjia.com/PHPjc/632654.htmlwww.bkjia.comtrue
http: //www.bkjia.com/PHPjc/632654.html
TechArticle
substr_replace is a bit like str_replace, which is to directly replace part of the string. Here is what I will tell you: Introduce the operation method. The substr_replace() function replaces a string...
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undress AI Tool

Undress AI Tool

Undress images for free

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

Hot Topics

PHP Tutorial
1583
276
go by example http middleware logging example go by example http middleware logging example Aug 03, 2025 am 11:35 AM

HTTP log middleware in Go can record request methods, paths, client IP and time-consuming. 1. Use http.HandlerFunc to wrap the processor, 2. Record the start time and end time before and after calling next.ServeHTTP, 3. Get the real client IP through r.RemoteAddr and X-Forwarded-For headers, 4. Use log.Printf to output request logs, 5. Apply the middleware to ServeMux to implement global logging. The complete sample code has been verified to run and is suitable for starting a small and medium-sized project. The extension suggestions include capturing status codes, supporting JSON logs and request ID tracking.

edge pdf viewer not working edge pdf viewer not working Aug 07, 2025 pm 04:36 PM

TestthePDFinanotherapptodetermineiftheissueiswiththefileorEdge.2.Enablethebuilt-inPDFviewerbyturningoff"AlwaysopenPDFfilesexternally"and"DownloadPDFfiles"inEdgesettings.3.Clearbrowsingdataincludingcookiesandcachedfilestoresolveren

Yii Developer: Mastering the Essential Technical Skills Yii Developer: Mastering the Essential Technical Skills Aug 04, 2025 pm 04:54 PM

To become a master of Yii, you need to master the following skills: 1) Understand Yii's MVC architecture, 2) Proficient in using ActiveRecordORM, 3) Effectively utilize Gii code generation tools, 4) Master Yii's verification rules, 5) Optimize database query performance, 6) Continuously pay attention to Yii ecosystem and community resources. Through the learning and practice of these skills, the development capabilities under the Yii framework can be comprehensively improved.

VS Code shortcut to focus on explorer panel VS Code shortcut to focus on explorer panel Aug 08, 2025 am 04:00 AM

In VSCode, you can quickly switch the panel and editing area through shortcut keys. To jump to the left Explorer panel, use Ctrl Shift E (Windows/Linux) or Cmd Shift E (Mac); return to the editing area to use Ctrl ` or Esc or Ctrl 1~9. Compared to mouse operation, keyboard shortcuts are more efficient and do not interrupt the encoding rhythm. Other tips include: Ctrl KCtrl E Focus Search Box, F2 Rename File, Delete File, Enter Open File, Arrow Key Expand/Collapse Folder.

Using HTML `input` Types for User Data Using HTML `input` Types for User Data Aug 03, 2025 am 11:07 AM

Choosing the right HTMLinput type can improve data accuracy, enhance user experience, and improve usability. 1. Select the corresponding input types according to the data type, such as text, email, tel, number and date, which can automatically checksum and adapt to the keyboard; 2. Use HTML5 to add new types such as url, color, range and search, which can provide a more intuitive interaction method; 3. Use placeholder and required attributes to improve the efficiency and accuracy of form filling, but it should be noted that placeholder cannot replace label.

Fixed: Windows Update Failed to Install Fixed: Windows Update Failed to Install Aug 08, 2025 pm 04:16 PM

RuntheWindowsUpdateTroubleshooterviaSettings>Update&Security>Troubleshoottoautomaticallyfixcommonissues.2.ResetWindowsUpdatecomponentsbystoppingrelatedservices,renamingtheSoftwareDistributionandCatroot2folders,thenrestartingtheservicestocle

go by example running a subprocess go by example running a subprocess Aug 06, 2025 am 09:05 AM

Run the child process using the os/exec package, create the command through exec.Command but not execute it immediately; 2. Run the command with .Output() and catch stdout. If the exit code is non-zero, return exec.ExitError; 3. Use .Start() to start the process without blocking, combine with .StdoutPipe() to stream output in real time; 4. Enter data into the process through .StdinPipe(), and after writing, you need to close the pipeline and call .Wait() to wait for the end; 5. Exec.ExitError must be processed to get the exit code and stderr of the failed command to avoid zombie processes.

Mastering Flow Control Within foreach Using break, continue, and goto Mastering Flow Control Within foreach Using break, continue, and goto Aug 06, 2025 pm 02:14 PM

breakexitstheloopimmediatelyafterfindingatarget,idealforstoppingatthefirstmatch.2.continueskipsthecurrentiteration,usefulforfilteringitemsliketemporaryfiles.3.gotojumpstoalabeledstatement,acceptableinrarecaseslikecleanuporerrorhandlingbutshouldbeused

See all articles