PHP substr_replace Substitution String Some instances

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

Usage

Substr_replace (String,replacement,start,length)

Note When the string contains Chinese, garbled characters will appear without special handling.

The code is as follows

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<?php $string 1 = "123456789"; Echo Substr_replace ($string 1, ' ### ', 0); //### Echo Substr_replace ($string 1, ' ### ', 5); 12345### Echo Substr_replace ($string 1, ' ### ', 0,0); # # #123456789 Echo Substr_replace ($string 1, ' ### ', 8,-2); 12345678## #9 Echo Substr_replace ($string 1, ' ### ', -6,-1); 123## #9 echo "n"; Echo Substr_replace ($string 1, ' ### ',-1); 123## #9 echo "n"; Echo Substr_replace ($string 1, ' ### ', 1,-1); 1## #9 Echo Substr_replace ($string 1, ' ### ', 1, 1); 1## #3456789 ?>

Example 2

The code is as follows

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<?php   $var = ' abcdefgh:/mnrpqr/';  echo "Original: $var  /* Two examples replace all of the $var with ' Bob '. */  echo substr_replace ($var, ' Bob ', 0). "<br/>n";  echo substr_replace ($var, ' Bob ', 0, strlen ($var)). "<br/>n";  /* Insert ' Bob ' right at the beginning of $var. */  echo substr_replace ($var, ' Bob ', 0, 0). "<br/>n";  /* These next two replace ' MNRPQR ' into $var with ' Bob '. */  echo substr_replace ($var, ' Bob ', 10,-1). "<br/>n";  echo substr_replace ($var, ' Bob ',-7,-1). "<br/>n";  /* Delete ' MNRPQR ' from $var. */  echo substr_replace ($var, ', 10,-1). "<br/>n"; ?

original:abcdefgh:/mnrpqr/
Bob
Bob
bobabcdefgh:/mnrpqr/
abcdefgh:/bob/
abcdefgh:/bob/
abcdefgh://

Replaces part of an excessive string with an ellipsis

The following program can keep the long string at the end and the middle with an ellipsis instead.

The code is as follows

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<?php $longString = ' abcdefghijklmnopqrstuvwxyz0123456789z.jpg '; $separator = ' ... '; $separatorlength = strlen ($separator); String that needs to be preserved $maxlength = 25-$separatorlength; Starting from half the length $start = $maxlength/2; Calculate offset $trunc = strlen ($longString)-$maxlength; Echo Substr_replace ($longString, $separator, $start, $trunc); Prints "Abcdefghij ... 56789z.jpg " ?>

Program Run Result:

Abcdefghijk ... 456789z.jpg

Program List: Replace the extra characters with ellipses

The code is as follows

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<?php 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 '; $result = t Runcate ($text, 35); Echo $result; ?

Well, you probably know how this function works.