[10.x] Adds start and end string replacement helpers

src/Illuminate/Support/Str.php

@@ -1007,6 +1007,29 @@ public static function replaceFirst($search, $replace, $subject)
         return $subject;
     }
 
+    /**
+     * Replace the first occurrence of the given value if it appears at the start of the string.
+     *
+     * @param  string  $search
+     * @param  string  $replace
+     * @param  string  $subject
+     * @return string
+     */
+    public static function replaceStart($search, $replace, $subject)
+    {
+        $search = (string) $search;
+
+        if ($search === '') {
+            return $subject;
+        }
+
+        if (static::startsWith($subject, $search)) {
+            return static::replaceFirst($search, $replace, $subject);
+        }
+
+        return $subject;
+    }
+
     /**
      * Replace the last occurrence of a given value in the string.
      *
@@ -1017,6 +1040,8 @@ public static function replaceFirst($search, $replace, $subject)
      */
     public static function replaceLast($search, $replace, $subject)
     {
+        $search = (string) $search;
+
         if ($search === '') {
             return $subject;
         }
@@ -1030,6 +1055,29 @@ public static function replaceLast($search, $replace, $subject)
         return $subject;
     }
 
+    /**
+     * Replace the last occurrence of a given value if it appears at the end of the string.
+     *
+     * @param  string  $search
+     * @param  string  $replace
+     * @param  string  $subject
+     * @return string
+     */
+    public static function replaceEnd($search, $replace, $subject)
+    {
+        $search = (string) $search;
+
+        if ($search === '') {
+            return $subject;
+        }
+
+        if (static::endsWith($subject, $search)) {
+            return static::replaceLast($search, $replace, $subject);
+        }
+
+        return $subject;
+    }
+
     /**
      * Remove any occurrence of the given string in the subject.
      *

src/Illuminate/Support/Stringable.php

@@ -656,6 +656,18 @@ public function replaceFirst($search, $replace)
         return new static(Str::replaceFirst($search, $replace, $this->value));
     }
 
+    /**
+     * Replace the first occurrence of the given value if it appears at the start of the string.
+     *
+     * @param  string  $search
+     * @param  string  $replace
+     * @return static
+     */
+    public function replaceStart($search, $replace)
+    {
+        return new static(Str::replaceStart($search, $replace, $this->value));
+    }
+
     /**
      * Replace the last occurrence of a given value in the string.
      *
@@ -668,6 +680,18 @@ public function replaceLast($search, $replace)
         return new static(Str::replaceLast($search, $replace, $this->value));
     }
 
+    /**
+     * Replace the last occurrence of a given value if it appears at the end of the string.
+     *
+     * @param  string  $search
+     * @param  string  $replace
+     * @return static
+     */
+    public function replaceEnd($search, $replace)
+    {
+        return new static(Str::replaceEnd($search, $replace, $this->value));
+    }
+
     /**
      * Replace the patterns matching the given regular expression.
      *

tests/Support/SupportStrTest.php

@@ -609,6 +609,19 @@ public function testReplaceFirst()
         $this->assertSame('Jönköping Malmö', Str::replaceFirst('', 'yyy', 'Jönköping Malmö'));
     }
 
+    public function testReplaceStart()
+    {
+        $this->assertSame('foobar foobar', Str::replaceStart('bar', 'qux', 'foobar foobar'));
+        $this->assertSame('foo/bar? foo/bar?', Str::replaceStart('bar?', 'qux?', 'foo/bar? foo/bar?'));
+        $this->assertSame('quxbar foobar', Str::replaceStart('foo', 'qux', 'foobar foobar'));
+        $this->assertSame('qux? foo/bar?', Str::replaceStart('foo/bar?', 'qux?', 'foo/bar? foo/bar?'));
+        $this->assertSame('bar foobar', Str::replaceStart('foo', '', 'foobar foobar'));
+        $this->assertSame('1', Str::replaceStart(0, '1', '0'));
+        // Test for multibyte string support
+        $this->assertSame('xxxnköping Malmö', Str::replaceStart('Jö', 'xxx', 'Jönköping Malmö'));
+        $this->assertSame('Jönköping Malmö', Str::replaceStart('', 'yyy', 'Jönköping Malmö'));
+    }
+
     public function testReplaceLast()
     {
         $this->assertSame('foobar fooqux', Str::replaceLast('bar', 'qux', 'foobar foobar'));
@@ -621,6 +634,20 @@ public function testReplaceLast()
         $this->assertSame('Malmö Jönköping', Str::replaceLast('', 'yyy', 'Malmö Jönköping'));
     }
 
+    public function testReplaceEnd()
+    {
+        $this->assertSame('foobar fooqux', Str::replaceEnd('bar', 'qux', 'foobar foobar'));
+        $this->assertSame('foo/bar? foo/qux?', Str::replaceEnd('bar?', 'qux?', 'foo/bar? foo/bar?'));
+        $this->assertSame('foobar foo', Str::replaceEnd('bar', '', 'foobar foobar'));
+        $this->assertSame('foobar foobar', Str::replaceEnd('xxx', 'yyy', 'foobar foobar'));
+        $this->assertSame('foobar foobar', Str::replaceEnd('', 'yyy', 'foobar foobar'));
+        $this->assertSame('fooxxx foobar', Str::replaceEnd('xxx', 'yyy', 'fooxxx foobar'));
+
+        // // Test for multibyte string support
+        $this->assertSame('Malmö Jönköping', Str::replaceEnd('ö', 'xxx', 'Malmö Jönköping'));
+        $this->assertSame('Malmö Jönkyyy', Str::replaceEnd('öping', 'yyy', 'Malmö Jönköping'));
+    }
+
     public function testRemove()
     {
         $this->assertSame('Fbar', Str::remove('o', 'Foobar'));

tests/Support/SupportStringableTest.php

@@ -863,6 +863,19 @@ public function testReplaceFirst()
         $this->assertSame('Jönköping Malmö', (string) $this->stringable('Jönköping Malmö')->replaceFirst('', 'yyy'));
     }
 
+    public function testReplaceStart()
+    {
+        $this->assertSame('foobar foobar', (string) $this->stringable('foobar foobar')->replaceStart('bar', 'qux'));
+        $this->assertSame('foo/bar? foo/bar?', (string) $this->stringable('foo/bar? foo/bar?')->replaceStart('bar?', 'qux?'));
+        $this->assertSame('quxbar foobar', (string) $this->stringable('foobar foobar')->replaceStart('foo', 'qux'));
+        $this->assertSame('qux? foo/bar?', (string) $this->stringable('foo/bar? foo/bar?')->replaceStart('foo/bar?', 'qux?'));
+        $this->assertSame('bar foobar', (string) $this->stringable('foobar foobar')->replaceStart('foo', ''));
+        $this->assertSame('1', (string) $this->stringable('0')->replaceStart(0, '1'));
+        // Test for multibyte string support
+        $this->assertSame('xxxnköping Malmö', (string) $this->stringable('Jönköping Malmö')->replaceStart('Jö', 'xxx'));
+        $this->assertSame('Jönköping Malmö', (string) $this->stringable('Jönköping Malmö')->replaceStart('', 'yyy'));
+    }
+
     public function testReplaceLast()
     {
         $this->assertSame('foobar fooqux', (string) $this->stringable('foobar foobar')->replaceLast('bar', 'qux'));
@@ -875,6 +888,20 @@ public function testReplaceLast()
         $this->assertSame('Malmö Jönköping', (string) $this->stringable('Malmö Jönköping')->replaceLast('', 'yyy'));
     }
 
+    public function testReplaceEnd()
+    {
+        $this->assertSame('foobar fooqux', (string) $this->stringable('foobar foobar')->replaceEnd('bar', 'qux'));
+        $this->assertSame('foo/bar? foo/qux?', (string) $this->stringable('foo/bar? foo/bar?')->replaceEnd('bar?', 'qux?'));
+        $this->assertSame('foobar foo', (string) $this->stringable('foobar foobar')->replaceEnd('bar', ''));
+        $this->assertSame('foobar foobar', (string) $this->stringable('foobar foobar')->replaceLast('xxx', 'yyy'));
+        $this->assertSame('foobar foobar', (string) $this->stringable('foobar foobar')->replaceEnd('', 'yyy'));
+        $this->assertSame('fooxxx foobar', (string) $this->stringable('fooxxx foobar')->replaceEnd('xxx', 'yyy'));
+
+        // // Test for multibyte string support
+        $this->assertSame('Malmö Jönköping', (string) $this->stringable('Malmö Jönköping')->replaceEnd('ö', 'xxx'));
+        $this->assertSame('Malmö Jönkyyy', (string) $this->stringable('Malmö Jönköping')->replaceEnd('öping', 'yyy'));
+    }
+
     public function testRemove()
     {
         $this->assertSame('Fbar', (string) $this->stringable('Foobar')->remove('o'));